[libgda] appdata: Mark a forgotten string for translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 63165fd201ce9b304d2fcd8f9aa514a13d77baf0
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat Aug 19 17:23:37 2017 +0200

    appdata: Mark a forgotten string for translation

 tools/browser/gda-browser-6.0.appdata.xml.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tools/browser/gda-browser-6.0.appdata.xml.in b/tools/browser/gda-browser-6.0.appdata.xml.in
index a9498a9..b14b196 100644
--- a/tools/browser/gda-browser-6.0.appdata.xml.in
+++ b/tools/browser/gda-browser-6.0.appdata.xml.in
@@ -4,7 +4,7 @@
 <application>
   <id type="desktop">gda-browser-6.0.desktop</id>
   <metadata_license>CC0-1.0</metadata_license>
-  <summary>View the schema and data of databases</summary>
+  <_summary>View the schema and data of databases</_summary>
   <description>
     <_p>
       Database Browser provides quick access to the data and schema of a database,