only build libspeex, avoiding building the sample programs, and errors in build…

only build libspeex, avoiding building the sample programs, and errors in build if libogg is not available

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@6295 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/codecs/mod_speex/Makefile

@@ -8,5 +8,5 @@ LOCAL_LIBADD=$(SPEEXLA)
 include $(BASE)/build/modmake.rules
 
 $(SPEEXLA): $(SPEEX_DIR) $(SPEEX_DIR)/.update
-	cd $(SPEEX_DIR) && $(MAKE)
+	cd $(SPEEX_DIR)/libspeex && $(MAKE)
 	$(TOUCH_TARGET)