[frogr] meson: Actually ignore the make_release.sh when creating the tarball

[Mario Sanchez Prada <msanchez src gnome org>]

commit 5705996ca4e872e943ab0edbab5c384f12df99d9
Author: Mario Sanchez Prada <msanchez gnome org>
Date:   Wed May 24 06:58:20 2017 +0100

    meson: Actually ignore the make_release.sh when creating the tarball
    
    I forgot to add the export-ignore rule when adding this to the
    .gitattributes file, so add it now to actually ignore the file.

 .gitattributes |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/.gitattributes b/.gitattributes
index af2f77e..0e77d04 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2,4 +2,4 @@
 .gitignore export-ignore
 flatpak export-ignore
 frogr.doap export-ignore
-make_release.sh
+make_release.sh export-ignore