Build with kati + ninja by default, unless specifically disabled with
USE_NINJA=false in the environment or on the make command line.
Bug:
23565895
Change-Id: I1fa9f5c6eb4d4ed3f5b81454f89d19fd2f1f6abb
# and host information.
include $(BUILD_SYSTEM)/config.mk
-ifeq ($(USE_NINJA),true)
+ifneq ($(USE_NINJA),false)
# Mark this is a ninja build.
$(shell mkdir -p $(OUT_DIR) && touch $(OUT_DIR)/ninja_build)
include build/core/ninja.mk