updates for Google Maps SDK 1.2.2

- link libc++ instead of libstdc++
- use GMSMarker instead of GMSMarkerOptions
- update Google Maps SDK to 1.2.2
- update GoogleMaps.framework.bridgesupport
Merge pull request #3 from toshikazuhorii/update_for_GoogleMaps_SDK_1.2.2

updates for Google Maps SDK 1.2.2