buildgcc: Remove quotes around a $CC call

If we use ccache we have to interpret spaces in $CC as separation
characters. The downside is that we can't support spaces in the
compiler's path. But, well...

Change-Id: I4e6e6324389354669a755f570083a40ff00b1bbf
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/18018
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins)
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc
index 273f921..0dfca26 100755
--- a/util/crossgcc/buildgcc
+++ b/util/crossgcc/buildgcc
@@ -517,7 +517,7 @@
 build_GMP() {
 	# Check if GCC enables `-pie` by default (possible since GCC 6).
 	# We need PIC in all static libraries then.
-	if "${CC}" -dumpspecs 2>/dev/null | grep -q '[{;][[:space:]]*:-pie\>'
+	if $CC -dumpspecs 2>/dev/null | grep -q '[{;][[:space:]]*:-pie\>'
 	then
 		OPTIONS="$OPTIONS --with-pic"
 	fi