[nautilus] gitignore: Add .flatpak-builder

[Carlos Soriano <csoriano src gnome org>]

commit 17a2ab21ef2901ddb712991aa9929881977b7eb1
Author: Carlos Soriano <csoriano gnome org>
Date:   Mon Mar 27 11:26:40 2017 +0200

    gitignore: Add .flatpak-builder
    
    The .flatpak-builder is used by flatpak-builder for internal use when
    building with flatpak, so ignore it.

 .gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/.gitignore b/.gitignore
index 1f9a046..10f3dab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@
 *.o
 .deps
 .libs
+.flatpak-builder
 Makefile
 Makefile.in
 /ABOUT-NLS