tweak that bit out of the makefile

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@745 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/asr_tts/mod_cepstral/Makefile

 ifeq ($(OSARCH),Darwin)
-CFLAGS += -L/Library/Frameworks/swift.framework/Versions/4 -I/Library/Frameworks/swift.framework/Versions/4/Headers
+CFLAGS += -I/Library/Frameworks/swift.framework/Versions/4/Headers
 LDFLAGS += -framework swift
 else
 LDFLAGS += -L/opt/swift/lib -lswift -lceplex_us -lceplang_en -lceplang_de -lceplang_es -lceplang_fr -lceplang_it -lm