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

SDL2_ttf/external/harfbuzz/.ci/build-win64.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+meson 	--cross-file=.ci/win64-cross-file.txt \
+	--wrap-mode=default \
+	-Dtests=disabled \
+	-Dcairo=enabled \
+	-Dcairo:fontconfig=disabled \
+	-Dcairo:freetype=disabled \
+	-Dcairo:dwrite=disabled \
+	-Dcairo:tests=disabled \
+	-Dglib=enabled \
+	-Dfreetype=disabled \
+	-Dgdi=enabled \
+	-Ddirectwrite=enabled \
+	win64build \
+	$@
+
+ninja -Cwin64build -j3 # building with all the cores won't work fine with CricleCI for some reason
+
+rm -rf win64build/harfbuzz-win64
+mkdir win64build/harfbuzz-win64
+cp win64build/util/hb-*.exe win64build/harfbuzz-win64
+find win64build -name '*.dll' -exec cp {} win64build/harfbuzz-win64 \;
+x86_64-w64-mingw32-strip win64build/harfbuzz-win64/*.{dll,exe}
+rm -f harfbuzz-win64.zip
+(cd win64build && zip -r ../harfbuzz-win64.zip harfbuzz-win64)
+echo "harfbuzz-win64.zip is ready."