fix mod_speex --srcdir build

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15922 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/codecs/mod_speex/Makefile

@@ -5,7 +5,7 @@ SPEEX_BUILDDIR=$(switch_builddir)/libs/speex
 SPEEXLA=$(SPEEX_BUILDDIR)/libspeex/libspeex.la
 SPEEXDSPLA=$(SPEEX_BUILDDIR)/libspeex/libspeexdsp.la
 
-LOCAL_CFLAGS=-I$(SPEEX_DIR)/include
+LOCAL_CFLAGS=-I$(SPEEX_DIR)/include -I$(SPEEX_BUILDDIR)/include
 LOCAL_LIBADD=$(SPEEXLA) $(SPEEXDSPLA)
 include $(BASE)/build/modmake.rules