[compiler-rt] [rtsan] Re-enable rtsan tests (PR #98219)

[Chris Apple via llvm-commits]

================
@@ -751,7 +751,8 @@ else()
   set(COMPILER_RT_HAS_ASAN FALSE)
 endif()
 
-if (COMPILER_RT_HAS_SANITIZER_COMMON AND RTSAN_SUPPORTED_ARCH)
+if (COMPILER_RT_HAS_SANITIZER_COMMON AND RTSAN_SUPPORTED_ARCH AND
+    OS_NAME MATCHES "Android|Darwin|Linux")
----------------
cjappl wrote:

Linux and Darwin are the platforms that we have easiest development access to in ubuntu and darwin. I think starting there and building up would be just fine.

https://github.com/llvm/llvm-project/pull/98219