travis: mac: disable --help check, it segfaults

Disable the binary `--help` sanity check on mac because it is currently
segfaulting.

Signed-off-by: Rafael Kitover <[email protected]>

.travis.yml

@@ -74,7 +74,7 @@ matrix:
               - cd build
               - cmake .. -DENABLE_SDL=ON -DENABLE_OPENAL=ON -DENABLE_LINK=ON
               - make -j2
-              - ./visualboyadvance-m.app/Contents/MacOS/visualboyadvance-m --help
+#              - ./visualboyadvance-m.app/Contents/MacOS/visualboyadvance-m --help
           cache:
               directories:
                   - "$HOME/.ccache"