chromium-28.0.1500.71 build failed on a system without base gcc

[George Liaskos]

Unfortunately /usr/bin/gcc is hardcoded, this fixes the build for me

diff --git a/www/chromium/Makefile b/www/chromium/Makefile
index dab973d..71c42e4 100644
--- a/www/chromium/Makefile
+++ b/www/chromium/Makefile
@@ -176,7 +176,9 @@ post-patch:
                ${WRKSRC}/third_party/libvpx/libvpx.gyp \
                ${WRKSRC}/crypto/crypto.gyp \
                ${WRKSRC}/v8/tools/gyp/v8.gyp \
-               ${WRKSRC}/v8/build/common.gypi
+               ${WRKSRC}/v8/build/common.gypi
+       @${REINPLACE_CMD} -e "s|/usr/bin/gcc|${CC}|" \
+               ${WRKSRC}/third_party/WebKit/Source/core/core.gypi
        @${REINPLACE_CMD} -e "s|linux|freebsd|" \
                ${WRKSRC}/tools/gyp/pylib/gyp/generator/make.py
        @${REINPLACE_CMD} -e "s|is_linux|(is_linux or is_bsd)|" \