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

SDL2_ttf/external/harfbuzz/harfbuzz.doap

@@ -0,0 +1,24 @@
+<Project xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+         xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
+         xmlns:foaf="http://xmlns.com/foaf/0.1/"
+         xmlns="http://usefulinc.com/ns/doap#">
+
+  <name xml:lang="en">harfbuzz</name>
+  <shortdesc xml:lang="en">Text shaping library</shortdesc>
+
+  <homepage
+  rdf:resource="https://github.com/harfbuzz/harfbuzz" />
+  <mailing-list
+  rdf:resource="https://github.com/harfbuzz/harfbuzz/discussions" />
+  <download-page
+  rdf:resource="https://github.com/harfbuzz/harfbuzz/releases" />
+  <bug-database
+  rdf:resource="https://github.com/harfbuzz/harfbuzz/issues" />
+
+  <maintainer>
+    <foaf:Person>
+      <foaf:name>Behdad Esfahbod</foaf:name>
+      <foaf:mbox rdf:resource="mailto:harfbuzz@behdad.org" />
+    </foaf:Person>
+  </maintainer>
+</Project>