[CompilerRT] Remove sanitizer support for i386 iossim

[usama54321]

Summary

This patch removes building sanitizers for i386 iossim. This is to reduce the toolchain size.

[yln]

Looks harmless enough.

compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake

148

If we anticipate to also drop the slice for tvossim and watchossim, then we could add this to the above if.

[usama54321]

Closed by 4729f6e03a12b0f3613416dc6f65407afa7e8f19

compiler-rt/cmake/Modules/CompilerRTDarwinUtils.cmake

function(darwin_test_archs os valid_archs)
 
   # The simple program will build for x86_64h on the simulator because it is 
   # compatible with x86_64 libraries (mostly), but since x86_64h isn't actually
   # a valid or useful architecture for the iOS simulator we should drop it.
   if(${os} MATCHES "^(iossim|tvossim|watchossim)$")
     list(REMOVE_ITEM archs "x86_64h")
   endif()
 
+  if(${os} MATCHES "iossim")
+    message(STATUS "Disabling i386 slice for iossim")
+    list(REMOVE_ITEM archs "i386")
+  endif()
+
   set(working_archs)
   foreach(arch ${archs})
    
     set(arch_linker_flags "-arch ${arch} ${os_linker_flags}")
     if(TEST_COMPILE_ONLY)
       # `-w` is used to surpress compiler warnings which `try_compile_only()` treats as an error.
       try_compile_only(CAN_TARGET_${os}_${arch} FLAGS -v -arch ${arch} ${DARWIN_${os}_CFLAGS} -w)
     else()