Ensure gettext files are included in dist tarball

commit c7881924 added
gettext support for policy files.  That commit included
its/loc files in git, but not in the disted tarballs.

This commit fixes that.

https://bugs.freedesktop.org/show_bug.cgi?id=96940Signed-off-by: Ray Strode <rstrode@redhat.com>

data/Makefile.am

@@ -37,7 +37,7 @@ pkgconfig_DATA = polkit-gobject-1.pc polkit-agent-1.pc
 # ----------------------------------------------------------------------------------------------------
 
 itsdir = $(datadir)/gettext/its
-its_DATA = polkit.loc polkit.its
+dist_its_DATA = polkit.loc polkit.its
 
 # ----------------------------------------------------------------------------------------------------