Merge pull request #2650 from hchac/remove-core-odin-from-gitignore

Don't gitignore folders named odin.

.gitignore

@@ -270,6 +270,7 @@ bin/
 
 # - Linux/MacOS
 odin
+!odin/
 odin.dSYM
 *.bin
 demo.bin
@@ -286,4 +287,4 @@ shared/
 *.sublime-workspace
 examples/bug/
 build.sh
-!core/debug/
+!core/debug/