Add workaround from llvm#63085

Author: jmcclellan-figma

compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake

@@ -21,7 +21,7 @@ if(APPLE)
   set(ARM64 arm64)
   set(ARM32 armv7 armv7s armv7k)
   set(ARM64_32 arm64_32)
-  set(X86_64 x86_64 x86_64h)
+  set(X86_64 x86_64h)
 endif()
 
 if(WIN32)

compiler-rt/cmake/builtin-config-ix.cmake

@@ -80,7 +80,7 @@ set(VE ve)
 if(APPLE)
   set(ARM64 arm64 arm64e)
   set(ARM32 armv7 armv7k armv7s)
-  set(X86_64 x86_64 x86_64h)
+  set(X86_64 x86_64h)
 endif()
 
 set(ALL_BUILTIN_SUPPORTED_ARCH