Add gnustl+rtti version of cpp full library
Add gnustl+rtti version of cpp full library

Adding new version of cpp  library,
'libprotobuf-cpp-2.3.0-full-gnustl-rtti'. Previously, c++ code
compiled against gnustl couldn't link with this library - having
both gnustl and stlport in same binary leads to nasty conflicts.

Bug: 7484202
Change-Id: Ic4fbbfc2839c4ce88bf605cf3d9cca47b146f965

CyanogenMod/android_external_protobuf,android-ia/platform_external_protobuf,geekboxzone/lollipop_external_protobuf,geekboxzone/lollipop_external_protobuf,geekboxzone/lollipop_external_protobuf,geekboxzone/mmallow_external_protobuf,geekboxzone/mmallow_external_protobuf,geekboxzone/mmallow_external_protobuf,geekboxzone/mmallow_external_protobuf,geekboxzone/lollipop_external_protobuf,MonkeyZZZZ/platform_external_protobuf,CyanogenMod/android_external_protobuf,xin3liang/platform_external_protobuf,android-ia/platform_external_protobuf,xin3liang/platform_external_protobuf,MonkeyZZZZ/platform_external_protobuf,geekboxzone/mmallow_external_protobuf,MonkeyZZZZ/platform_external_protobuf,android-ia/platform_external_protobuf,MonkeyZZZZ/platform_external_protobuf,CyanogenMod/android_external_protobuf,geekboxzone/lollipop_external_protobuf,xin3liang/platform_external_protobuf,xin3liang/platform_external_protobuf,xin3liang/platform_external_protobuf,MonkeyZZZZ/platform_external_protobuf,CyanogenMod/android_external_protobuf,android-ia/platform_external_protobuf,CyanogenMod/android_external_protobuf