[gtkmm/gtkmm-3-22] Update build/.gitignore

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 3002ed863d2d85d57431e3aa1df9721d5dd3787c
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Wed Sep 13 16:16:16 2017 +0200

    Update build/.gitignore

 build/.gitignore |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/build/.gitignore b/build/.gitignore
index 5a7e57f..dde7480 100644
--- a/build/.gitignore
+++ b/build/.gitignore
@@ -1,3 +1,4 @@
+/compile
 /compile-binding.am
 /config.guess
 /config.sub