[jhbuild] fix reference to dtd

[Frederic Peters <fpeters src gnome org>]

commit ef45bc49ce2ca0012f69440bf34e61e1f9475570
Author: Frédéric Péters <fpeters 0d be>
Date:   Sat Nov 23 18:14:13 2013 +0100

    fix reference to dtd

 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 6d2fae5..62396cd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -52,7 +52,7 @@ install-exec-local:
 #
 # This will fail if xmllint isn't installed.
 check-modulesets:
-       xmllint --noout --dtdvalid modulesets/moduleset.dtd $(MODULESETS)
+       xmllint --noout --dtdvalid $(srcdir)/modulesets/moduleset.dtd $(MODULESETS)
 .PHONY: check-modulesets
 
 check: check-modulesets