repositories: add ex_repo-overlay

Closes: #717
Signed-off-by: Sam James <[email protected]>

Author: Arniiiii

files/overlays/repositories.xml

@@ -1286,6 +1286,18 @@
     <source type="git">[email protected]:eugene-bright/eugene-bright-overlay.git</source>
     <feed>https://github.com/eugene-bright/eugene-bright-overlay/commits/master.atom</feed>
   </repo>
+  <repo quality="experimental" status="unofficial">
+    <name>ex_repo</name>
+    <description lang="en">Arniiiii's overlay. Mostly C++ related.</description>
+    <homepage>https://github.com/Arniiiii/ex_repo</homepage>
+    <owner type="person">
+      <email>[email protected]</email>
+      <name>Arniiiii</name>
+    </owner>
+    <source type="git">https://github.com/Arniiiii/ex_repo.git</source>
+    <source type="git">git+ssh://[email protected]/Arniiiii/ex_repo.git</source>
+    <feed>https://github.com/Arniiiii/ex_repo/commits/master.atom</feed>
+  </repo>
   <repo quality="experimental" status="unofficial">
     <name>ext-devlibs</name>
     <description lang="en">Mostly c/c++ and python libraries</description>