Fix building when $PATH contains spaces

build-compiler-rt.sh

@@ -22,7 +22,7 @@ fi
 
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
-export PATH=$PREFIX/bin:$PATH
+export PATH="$PREFIX/bin:$PATH"
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}