add a lib for rendering text in sdl2 and rules to make in makefile

SDL2_ttf/external/harfbuzz/util/Makefile.sources

@@ -0,0 +1,59 @@
+HB_VIEW_sources = \
+	ansi-print.hh \
+	face-options.hh \
+	font-options.hh \
+	hb-view.cc \
+	helper-cairo-ansi.hh \
+	helper-cairo-ft.hh \
+	helper-cairo.hh \
+	main-font-text.hh \
+	options.hh \
+	output-options.hh \
+	shape-consumer.hh \
+	shape-options.hh \
+	text-options.hh \
+	view-cairo.hh \
+	view-options.hh \
+	$(NULL)
+
+HB_SHAPE_sources = \
+	batch.hh \
+	face-options.hh \
+	font-options.hh \
+	hb-shape.cc \
+	main-font-text.hh \
+	options.hh \
+	output-options.hh \
+	shape-consumer.hh \
+	shape-format.hh \
+	shape-options.hh \
+	shape-output.hh \
+	text-options.hh \
+	$(NULL)
+
+HB_INFO_sources = \
+	batch.hh \
+	face-options.hh \
+	font-options.hh \
+	hb-info.cc \
+	options.hh \
+	$(NULL)
+
+HB_SUBSET_CLI_sources = \
+	batch.hh \
+	face-options.hh \
+	hb-subset.cc \
+	main-font-text.hh \
+	options.hh \
+	output-options.hh \
+	text-options.hh \
+	$(NULL)
+
+HB_OT_SHAPE_CLOSURE_sources = \
+	face-options.hh \
+	font-options.hh \
+	hb-ot-shape-closure.cc \
+	main-font-text.hh \
+	options.hh \
+	text-options.hh \
+	$(NULL)