Enable ccache for Raspberry Pi buildbot script.
diff --git a/build-scripts/raspberrypi-buildbot.sh b/build-scripts/raspberrypi-buildbot.sh
index bcffaf4..1cc637c 100755
--- a/build-scripts/raspberrypi-buildbot.sh
+++ b/build-scripts/raspberrypi-buildbot.sh
@@ -39,7 +39,7 @@ mkdir -p $BUILDBOTDIR
pushd $BUILDBOTDIR
SYSROOT="/opt/rpi-sysroot"
-export CC="/opt/rpi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc --sysroot=$SYSROOT -I$SYSROOT/opt/vc/include -I$SYSROOT/usr/include -I$SYSROOT/opt/vc/include/interface/vcos/pthreads -I$SYSROOT/opt/vc/include/interface/vmcs_host/linux -L$SYSROOT/opt/vc/lib"
+export CC="ccache /opt/rpi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-gcc --sysroot=$SYSROOT -I$SYSROOT/opt/vc/include -I$SYSROOT/usr/include -I$SYSROOT/opt/vc/include/interface/vcos/pthreads -I$SYSROOT/opt/vc/include/interface/vmcs_host/linux -L$SYSROOT/opt/vc/lib"
# -L$SYSROOT/usr/lib/arm-linux-gnueabihf"
# !!! FIXME: shouldn't have to --disable-* things here.
../configure --with-sysroot=$SYSROOT --host=arm-raspberry-linux-gnueabihf --prefix=$PWD/rpi-sdl2-installed --disable-pulseaudio --disable-esd