[DEBUGINFO] Add option that allows to disable emission of flags in .loc directives.
Summary:
Some targets do not support extended format of .loc directive and
support only simple format: .loc <FileID> <Line> <Column>. Patch adds
MCAsmInfo flag and option that allows emit .loc directive without
additional flags.
Reviewers: echristo
Subscribers: llvm-commits
Differential Revision: https://reviews.llvm.org/D45184
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@329089
91177308-0d34-0410-b5e6-
96231b3b80d8
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