move def. of liblangtag inc. path to configure

Change-Id: Idef3015bf7b7bb5e0d984ac0b0a2163172cacc17

RepositoryExternal.mk

@@ -1043,7 +1043,7 @@ $(eval $(call gb_Helper_register_packages_for_install,ooo,\
 define gb_LinkTarget__use_liblangtag
 $(call gb_LinkTarget_use_unpacked,$(1),langtag)
 $(call gb_LinkTarget_set_include,$(1),\
-	-I$(call gb_UnpackedTarball_get_dir,langtag) \
+	$(LIBLANGTAG_CFLAGS) \
 	$$(INCLUDE) \
 )
 $(call gb_LinkTarget_add_libs,$(1),$(LIBLANGTAG_LIBS))

configure.ac

@@ -11803,6 +11803,7 @@ if test "$enable_liblangtag" = "yes" -o \
         SYSTEM_LIBLANGTAG=
         AC_MSG_RESULT([no])
         BUILD_TYPE="$BUILD_TYPE LIBLANGTAG"
+        LIBLANGTAG_CFLAGS="-I${WORKDIR}/UnpackedTarball/langtag"
         if test "$COM" = "MSC"; then
             LIBLANGTAG_LIBS="${WORKDIR}/UnpackedTarball/langtag/liblangtag/.libs/liblangtag.lib"
         else