[gnome-maps] trivial: Add the flatpak build generated directory to git ignore

[Marcus Lundblad <mlundblad src gnome org>]

commit 6fbd16bfccdfa712d884e04f5ee3e2b99f9687cd
Author: Marcus Lundblad <ml update uu se>
Date:   Fri Dec 9 22:39:32 2016 +0100

    trivial: Add the flatpak build generated directory to git ignore

 .gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index e84e30d..139180b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,7 @@ configure
 install-sh
 missing
 .deps/
+.flatpak-builder/
 .libs/
 *.o
 *.lo