don't build mod that does not exist

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@7783 d0543943-73ff-0310-b7d9-9358b9ac24b2

freeswitch.spec

@@ -156,7 +156,7 @@ PASSTHRU_CODEC_MODULES="codecs/mod_g729 codecs/mod_g723_1 codecs/mod_amr"
 SPIDERMONKEY_MODULES="languages/mod_spidermonkey languages/mod_spidermonkey_curl languages/mod_spidermonkey_core_db languages/mod_spidermonkey_odbc languages/mod_spidermonkey_socket languages/mod_spidermonkey_teletone"
 APPLICATIONS_MODULES="applications/mod_commands applications/mod_conference applications/mod_dptools applications/mod_enum applications/mod_esf applications/mod_expr applications/mod_fifo applications/mod_limit applications/mod_rss applications/mod_voicemail"
 ASR_TTS_MODULES="asr_tts/mod_openmrcp"
-CODECS_MODULES="codecs/mod_gsm codecs/mod_ilbc codecs/mod_h26x codecs/mod_voipcodecs codecs/mod_speex"
+CODECS_MODULES="codecs/mod_ilbc codecs/mod_h26x codecs/mod_voipcodecs codecs/mod_speex"
 DIALPLANS_MODULES="dialplans/mod_dialplan_asterisk dialplans/mod_dialplan_directory dialplans/mod_dialplan_xml"
 DIRECTORIES_MODULES=
 DOTNET_MODULES=