[CMake] [Darwin] [macho_embedded] Specify the version min explicitly.

We need to set the OS X deployment target on the macho_embedded libraries to match the outputs from the autoconf build system.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@248944 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/Modules/CompilerRTDarwinUtils.cmake b/cmake/Modules/CompilerRTDarwinUtils.cmake
index e2fe795..86c4542 100644
--- a/cmake/Modules/CompilerRTDarwinUtils.cmake
+++ b/cmake/Modules/CompilerRTDarwinUtils.cmake
@@ -376,6 +376,7 @@
       string(TOLOWER "${float_type}_${type}" lib_suffix)
       foreach(arch ${DARWIN_${float_type}_FLOAT_ARCHS})
         set(DARWIN_macho_embedded_SYSROOT ${DARWIN_osx_SYSROOT})
+        set(DARWIN_macho_embedded_BUILTIN_MIN_VER_FLAG ${DARWIN_osx_BUILTIN_MIN_VER_FLAG})
         if(${arch} MATCHES "^arm")
           set(DARWIN_macho_embedded_SYSROOT ${DARWIN_ios_SYSROOT})
         endif()