[gtksourceview] protobuf: add oneof keyword

[Paolo Borelli <pborelli src gnome org>]

commit 69aa9e2bb722a430b83a375ee54a527469d8a9bd
Author: Paolo Borelli <pborelli gnome org>
Date:   Mon Feb 1 17:03:22 2016 +0100

    protobuf: add oneof keyword

 data/language-specs/protobuf.lang |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/language-specs/protobuf.lang b/data/language-specs/protobuf.lang
index b502001..0fa9cdd 100644
--- a/data/language-specs/protobuf.lang
+++ b/data/language-specs/protobuf.lang
@@ -80,6 +80,7 @@
       <keyword>extend</keyword>
       <keyword>extensions</keyword>
       <keyword>message</keyword>
+      <keyword>oneof</keyword>
       <keyword>optional</keyword>
       <keyword>option</keyword>
       <keyword>package</keyword>