gcc: fixed quoting in gcc.conf to properly find the needed libraries

base/gcc/gcc.conf

@@ -131,10 +131,10 @@ if atstage toolchain; then
 	var_append confopt " " "--disable-libquadmath"
 
 	# use the native libraries we build in the toolchain directory
-	var_append extraconfopt ' ' '--with-gmp=$root'
-	var_append extraconfopt ' ' '--with-mpfr=$root --with-mpfr-lib=$root/$libdir'
-	var_append extraconfopt ' ' '--with-ppl=$root'
-	var_append extraconfopt ' ' '--with-cloog=$root'
+	var_append extraconfopt ' ' "--with-gmp=$root"
+	var_append extraconfopt ' ' "--with-mpfr=$root --with-mpfr-lib=$root/$libdir"
+	var_append extraconfopt ' ' "--with-ppl=$root"
+	var_append extraconfopt ' ' "--with-cloog=$root"
 	export LDFLAGS="-Wl,-rpath,${root}${libdir}"
 fi