[gtk+] Fix distclean

[Matthias Clasen <matthiasc src gnome org>]

commit fe2260c53d52d581fe07656f71fe6afeed6ba9c6
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 27 18:25:08 2013 -0400

    Fix distclean
    
    extract-strings was left behind.

 gtk/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index dafebe6..4085014 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -1296,6 +1296,7 @@ distclean-local:
        if test $(srcdir) != .; then \
          rm -f $(MAINTAINERCLEANFILES); \
          rm -rf stock-icons; \
+         rm -f extract-strings$(EXEEXT); \
        fi
 
 DEPS = libgtk-3.la $(top_builddir)/gdk/libgdk-3.la