Can't build the android port of servo on Mac and Ubuntu.

[ghost]

ToT currently breaks at:

src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp: In function 'const GrGLInterface* GrGLCreateNativeInterface()': src/gpu/gl/android/GrGLCreateNativeInterface_android.cpp:79:36: error: invalid conversion from 'void (*)(GLuint, GLsizei, const GLchar* const*, const GLint*) {aka void (*)(unsigned int, int, char const* const*, int const*)}' to 'void (*)(unsigned int, int, char const**, int const*)' [-fpermissive] include/gpu/gl/GrGLInterface.h:116:15: error: initializing argument 1 of 'GrGLInterface::GLPtr GrGLInterface::GLPtr::operator=(FNPTR_TYPE) [with FNPTR_TYPE = void (*)(unsigned int, int, char const**, int const*), GrGLInterface::GLPtr = GrGLInterface::GLPtr]' [-fpermissive] make[1]: *** [/Volumes/lab101/FOSS/Servo/ports/android/glut_app/target/arm-linux-androideabi/native/skia-sys-60a65b28f3cfaa09/src/gpu/gl/android/GrGLCreateNativeInterface_android.o] Error 1 make[1]: *** Waiting for unfinished jobs....

I think we need to turn GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE on for resolving the above build errors.

My development environment is:

Mac OS X Yosemite 10.10
Ubuntu 14.04 64 Bits
Android SDK 21
Android NDK r10c
GCC 4.8.2