Fixes: Mime type for objc files.

src/plugins/cppeditor/CppEditor.mimetypes.xml

@@ -44,4 +44,15 @@
         <glob pattern="*.C"/>
         <glob pattern="*.inl"/>
     </mime-type>
+
+    <mime-type type="text/x-objcsrc">
+         <comment>Objective-C source code</comment>
+         <sub-class-of type="text/x-csrc"/>
+         <magic priority="30">
+         <match value="#import" type="string" offset="0"/>
+         </magic>
+         <glob pattern="*.m"/>
+         <glob pattern="*.mm"/>
+    </mime-type>
+
 </mime-info>