Fixed Android build.

src/glimports.h

@@ -591,6 +591,8 @@ GL_IMPORT______(true,  PFNGLTEXSTORAGE3DPROC,                      glTexStorage3
 GL_IMPORT______(true,  PFNGLTEXIMAGE2DMULTISAMPLEPROC,             glTexImage2DMultisample);
 GL_IMPORT______(true,  PFNGLTEXIMAGE3DMULTISAMPLEPROC,             glTexImage3DMultisample);
 
+GL_IMPORT______(true,  PFNGLFRAMEBUFFERTEXTURELAYERPROC,           glFramebufferTextureLayer);
+
 GL_IMPORT______(true,  PFNGLINSERTEVENTMARKEREXTPROC,              glInsertEventMarker);
 GL_IMPORT______(true,  PFNGLPUSHGROUPMARKEREXTPROC,                glPushGroupMarker);
 GL_IMPORT______(true,  PFNGLPOPGROUPMARKEREXTPROC,                 glPopGroupMarker);