[gnome-photos] build: Workaround intltool-update not working with automake-1.15

[Debarshi Ray <debarshir src gnome org>]

commit b7571c2709770656f9e80b1cfc5bb847f66e47e7
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Oct 27 11:57:02 2015 +0100

    build: Workaround intltool-update not working with automake-1.15
    
    This is caused by automake-1.15 changing the location of the build tree
    during distcheck, and the fact that intltool doesn't ignore the path,
    yet.
    
    Original patch from Zbigniew Jędrzejewski-Szmek for systemd.
    
    https://bugs.launchpad.net/intltool/+bug/1117944

 configure.ac |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d558281..438c89d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -148,6 +148,11 @@ fi
 AX_REQUIRE_DEFINED([YELP_HELP_INIT])
 YELP_HELP_INIT
 
+# work around intltool-update issues during 'make distcheck'
+AS_IF([test "x$0" != "x./configure"], [
+  AC_SUBST([INTLTOOL_UPDATE], [/bin/true])
+])
+
 AC_CONFIG_FILES([
 Makefile
 data/Makefile