Used external roborio compiler instead of local compiler.

Change-Id: Ifec0d68b0b51a822c906bc4f52320004ee2f5d84
diff --git a/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-cpp b/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-cpp
new file mode 100755
index 0000000..c04ad23
--- /dev/null
+++ b/tools/cpp/arm-frc-linux-gnueabi/arm-frc-linux-gnueabi-cpp
@@ -0,0 +1,5 @@
+#!/bin/bash --norc
+
+exec -a arm-frc-linux-gnueabi-cpp \
+	"${BAZEL_OUTPUT_ROOT}external/arm-frc-linux-gnueabi-repo/usr/bin/arm-frc-linux-gnueabi-cpp" \
+	"$@"