fix --srcdir build for mod_ilbc

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15847 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/codecs/mod_ilbc/Makefile

@@ -2,7 +2,7 @@ BASE=../../../..
 ILBC_DIR=$(switch_srcdir)/libs/ilbc
 ILBC_BUILDDIR=$(switch_builddir)/libs/ilbc
 ILBCLA=$(ILBC_BUILDDIR)/src/libilbc.la
-LOCAL_CFLAGS=-I$(ILBC_DIR)/src
+LOCAL_CFLAGS=-I$(ILBC_DIR)/src -I$(ILBC_BUILDDIR)/src
 LOCAL_LIBADD=$(ILBCLA)
 
 include $(BASE)/build/modmake.rules