DO NOT MERGE: android: translate soong build rules for libLLVM12

DO NOT MERGE: android: translate soong build rules for libLLVM12

Changes to side build external/llvm-project project (llvm 12 version)
and avoid conflicts with external/llvm project targets and variables
Changes in mesa main Android.mk are required for libLLVM12
shared library dependency and cflag -DMESA_LLVM_VERSION_STRING=\"12.0\"

The changelog is described by means of modules and variables
which needed to be renamed in external/llvm-project/llvm/ path:

 #rename the target shared library and all static libraries
find . -type f -name "*.bp" -exec sed -i 's/libLLVM/libLLVM12/g' {} +

 #rename the boostrap and contextual build paths
find . -type f -name "*.bp" -exec sed -i 's/soong\-llvm/\soong-llvm12/g' {} +
find . -type f -name "*.go" -exec sed -i 's/android\/soong\/llvm/android\/soong\/llvm12/g' {} +

 #rename force_build_llvm_components type and module name
find . -type f -name '*.bp' -exec sed -i 's/force_build_llvm_components/force_build_llvm12_components/g' {} +
find . -type f -name '*.go' -exec sed -i 's/force_build_llvm_components/force_build_llvm12_components/g' {} +

 #rename all module that gave 'already defined' error
find . -type f -name '*.bp' -exec sed -i 's/llvm-aarch64-defaults/llvm12-aarch64-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-aarch64-headers/llvm12-aarch64-headers/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-amdgpu-defaults/llvm12-amdgpu-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-amdgpu-headers/llvm12-amdgpu-headers/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-arm-defaults/llvm12-arm-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-arm-headers/llvm12-arm-headers/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-defaults/llvm12-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-defaults-no-generated-headers/llvm12-defaults-no-generated-headers/g' {} +
 #note the following line replaced all llvm-gen-* entries of the previous versions
find . -type f -name '*.bp' -exec sed -i 's/llvm-gen-/llvm12-gen-/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-headers/llvm12-headers/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-headers-no-generated-headers/llvm12-headers-no-generated-headers/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-lib-defaults/llvm12-lib-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-mips-defaults/llvm12-mips-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-mips-headers/llvm12-mips-headers/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-tblgen/llvm12-tblgen/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-x86-defaults/llvm12-x86-defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm-x86-headers/llvm12-x86-headers/g' {} +

 #rename llvm-gen-instcombine module
find . -type f -name '*.bp' -exec sed -i 's/llvm-gen-instcombine/llvm12-gen-instcombine/g' {} +

 #rename the binaries
find . -type f -name '*.bp' -exec sed -i 's/LLVMHello/LLVM12Hello/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/LLVMgold/LLVM12gold/g' {} +

 #rename the TableGen binary module and variable in different files
find . -type f -name '*.go' -exec sed -i 's/LLVM TableGen/LLVM12 TableGen/g' {} +
find . -type f -name '*.go' -exec sed -i 's/llvm-tblgen/llvm12-tblgen/g' {} +
find . -type f -name '*.go' -exec sed -i 's/llvmTblgen/llvm12Tblgen/g' {} +
find . -type f -name '*.go' -exec sed -i 's/tblgenRule/tblgenRule12/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/llvm_tblgen/llvm12_tblgen/g' {} +
find . -type f -name '*.go' -exec sed -i 's/llvm_tblgen/llvm12_tblgen/g' {} +
find . -type f -name 'tdtags' -exec sed -i 's/llvm-tblgen/llvm12-tblgen/g' {} +

 #COMMENTED AS NOT NEEDED in external/llvm-project (was: rename the include paths)
 #find . -type f -name '*.bp' -exec sed -i 's/external\/llvm/external\/llvm12/g' {} +
 #find . -type f -name '*.go' -exec sed -i 's/external\/llvm/external\/llvm12/g' {} +

 #rename package, registered types and llvm-config
find . -type f -name '*.go' -exec sed -i 's/package llvm/package llvm12/g' {} +
find . -type f -name '*.go' -exec sed -i 's/llvm_tblgen/llvm12_tblgen/g' {} +
find . -type f -name '*.go' -exec sed -i 's/llvm_defaults/llvm12_defaults/g' {} +
find . -type f -name '*.bp' -exec sed -i 's/ llvm-config / llvm12-config /g' {} +
find . -type f -name '*.bp' -exec sed -i 's/"llvm-config"/"llvm12-config"/g' {} +
find . -type f -name '*.go' -exec sed -i 's/"llvm-config"/"llvm12-config"/g' {} +