More #1025 (support for using external third party libraries): 
 - support for using external libspeex and libgsm
 - replaced --with-pa-path with --with-external-pa


git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@3062 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjmedia/include/pjmedia-codec/config_auto.h.in b/pjmedia/include/pjmedia-codec/config_auto.h.in
index 69b5628..1926427 100644
--- a/pjmedia/include/pjmedia-codec/config_auto.h.in
+++ b/pjmedia/include/pjmedia-codec/config_auto.h.in
@@ -42,12 +42,14 @@
 #undef PJMEDIA_HAS_GSM_CODEC
 #endif
 
+#undef PJMEDIA_EXTERNAL_GSM_CODEC
 
 /* Speex codec */
 #ifndef PJMEDIA_HAS_SPEEX_CODEC
 #undef PJMEDIA_HAS_SPEEX_CODEC
 #endif
 
+#undef PJMEDIA_EXTERNAL_SPEEX_CODEC
 
 /* iLBC codec */
 #ifndef PJMEDIA_HAS_ILBC_CODEC