Re #1768: Add forced GC to libDestroy() in SWIG Java.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4906 74dad513-b988-da41-8d7b-12977e46ad98
Re #1757: Add iOS video renderer OpenGL macro settings to config.h.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4907 74dad513-b988-da41-8d7b-12977e46ad98
Re #1757: Set OpenGL as default renderer on iOS (initialized before UIView renderer).


git-svn-id: http://svn.pjsip.org/repos/pjproject@4908 74dad513-b988-da41-8d7b-12977e46ad98