[PATCH] [CMake] Cleanup add_compiler_rt_object_library to be platform-agnostic

[Alexey Samsonov]

================
Comment at: lib/lsan/CMakeLists.txt:22
@@ +21,3 @@
+add_compiler_rt_object_library(RTLSanCommon
+    OS ${SANITIZER_COMMON_SUPPORTED_DARWIN_OS}
+    ARCH ${LSAN_COMMON_SUPPORTED_ARCH}
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It's weird that we now use `SANITIZER_COMMON_SUPPORTED_DARWIN_OS` on non-Darwin platforms.

http://reviews.llvm.org/D10250

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