gsmopen: cleaning Makefile, libctb and its includes need to be installed and ldconfigged

src/mod/endpoints/mod_gsmopen/Makefile

 MODNAME=mod_gsmopen
 SVNDEF := -D'GSMOPEN_SVN_VERSION="$(shell svnversion -n .)"'
 #LOCAL_CFLAGS += $(SVNDEF) -I/usr/src/gsmlib-1.10
-LOCAL_CFLAGS += $(SVNDEF) -DNO_GSMLIB -DNO_ALSA -I../../../../libs/spandsp/src -I../../../..//libs/tiff-3.8.2/libtiff -Ilibctb-0.16/include/
+LOCAL_CFLAGS += $(SVNDEF) -DNO_GSMLIB -DNO_ALSA -I../../../../libs/spandsp/src -I../../../..//libs/tiff-3.8.2/libtiff
 #LOCAL_LDFLAGS=-lasound -L/usr/src/gsmlib-1.10/gsmlib/.libs -lgsmme
 LOCAL_LDFLAGS=-L../../../../libs/spandsp/src -lspandsp -lctb-0.16