change RC_BUILDIT to RC_XBS for detecting Apple build environment git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@130970 91177308-0d34-0410-b5e6-96231b3b80d8 
diff --git a/lib/buildit b/lib/buildit index 6856518..291c363 100755 --- a/lib/buildit +++ b/lib/buildit 
@@ -34,7 +34,7 @@    case $TRIPLE in  *-apple-*) - if [ -z $RC_BUILDIT ] + if [ -z $RC_XBS ]  then  RC_CFLAGS="-arch i386 -arch x86_64"  fi @@ -79,7 +79,7 @@  ;;  esac   -if [ -z $RC_BUILDIT ] +if [ -z $RC_XBS ]  then  rm -f libc++.1.$SOEXT*  fi @@ -95,7 +95,7 @@    #libtool -static -o libc++.a *.o   -if [ -z $RC_BUILDIT ] +if [ -z $RC_XBS ]  then  rm *.o  fi