Fix CMake definitions of tsan runtime to make it installed by "install-compiler-rt"

[mehdi_amini]

Summary

The PARENT_TARGET was correctly set under APPLE but not under linux.

compiler-rt/trunk/lib/tsan/CMakeLists.txt

elseif(arch MATCHES "powerpc64|powerpc64le")
     add_compiler_rt_runtime(clang_rt.tsan
       STATIC
       ARCHS ${arch}
       SOURCES ${TSAN_SOURCES} ${TSAN_ASM_SOURCES}
               $<TARGET_OBJECTS:RTInterception.${arch}>
               $<TARGET_OBJECTS:RTSanitizerCommon.${arch}>
               $<TARGET_OBJECTS:RTSanitizerCommonLibc.${arch}>
               $<TARGET_OBJECTS:RTUbsan.${arch}>
-      CFLAGS ${TSAN_RTL_CFLAGS})
+      CFLAGS ${TSAN_RTL_CFLAGS}
+      PARENT_TARGET tsan)
     add_compiler_rt_runtime(clang_rt.tsan_cxx
       STATIC
       ARCHS ${arch}
       SOURCES ${TSAN_CXX_SOURCES}
               $<TARGET_OBJECTS:RTUbsan_cxx.${arch}>
-      CFLAGS ${TSAN_RTL_CFLAGS})
+      CFLAGS ${TSAN_RTL_CFLAGS}
+      PARENT_TARGET tsan)
     list(APPEND TSAN_RUNTIME_LIBRARIES clang_rt.tsan-${arch}
                                        clang_rt.tsan_cxx-${arch})
     add_sanitizer_rt_symbols(clang_rt.tsan
       ARCHS ${arch}
       EXTRA rtl/tsan.syms.extra)
     add_sanitizer_rt_symbols(clang_rt.tsan_cxx
       ARCHS ${arch}
       EXTRA rtl/tsan.syms.extra)