[gnome-builder] build: update gitignore

[Christian Hergert <chergert src gnome org>]

commit 94d58cf2a355c57459699ed90751f9e3e410b5aa
Author: Christian Hergert <christian hergert me>
Date:   Sun Sep 6 14:13:31 2015 -0700

    build: update gitignore

 libide/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index 28fe6a5..8fc4ddb 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -382,4 +382,6 @@ typelib_DATA = $(INTROSPECTION_GIRS:.gir=.typelib)
 CLEANFILES += $(gir_DATA) $(typelib_DATA)
 endif
 
+GITIGNOREFILES = Ide-1.0.gir
+
 -include $(top_srcdir)/git.mk