Quieter cmake.

Stop it spamming ' -- Installing' messages. We know it is installing assets.
Also make travis a bit quieter.

b.sh

@@ -1,8 +1,11 @@
 cp -r android/assets .
 mkdir -p build
 if [[ "$1" == "--headless" ]]; then
-    HEADLESS="-DHEADLESS=ON"
+	HEADLESS="-DHEADLESS=ON"
 else
 	MAKE_OPT="$1"
 fi
-(cd build; cmake $HEADLESS .. && make -j3 $MAKE_OPT; cd ..)
+pushd build
+cmake $HEADLESS .. | grep -v '^-- '
+make -j4 $MAKE_OPT
+popd