[gtksourceview] rust.lang: Add mimetype

[Garrett Regier <gregier src gnome org>]

commit eca2a420d475dc3b558b5fe104eea00cac7ecbf1
Author: Garrett Regier <garrettregier gmail com>
Date:   Fri Aug 26 10:29:15 2016 -0700

    rust.lang: Add mimetype
    
    https://cgit.freedesktop.org/xdg/shared-mime-info/commit/?id=f75cbe0d37c990580dbb6f0694b53bc0c914d933

 data/language-specs/rust.lang |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/language-specs/rust.lang b/data/language-specs/rust.lang
index 4546232..5632591 100644
--- a/data/language-specs/rust.lang
+++ b/data/language-specs/rust.lang
@@ -35,6 +35,7 @@ except according to those terms.
 
 <language id="rust" _name="Rust" version="2.0" _section="Source">
   <metadata>
+    <property name="mimetypes">text/rust</property>
     <property name="globs">*.rs</property>
     <property name="line-comment-start">//</property>
     <property name="block-comment-start">/*</property>