[ostree] build: make "sudo make install" over existing install work

[Colin Walters <walters src gnome org>]

commit 371cebf258abf1c731bf18edadb908b11b5717e8
Author: Colin Walters <walters verbum org>
Date:   Thu Feb 13 10:57:05 2014 -0500

    build: make "sudo make install" over existing install work

 Makefile-tests.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/Makefile-tests.am b/Makefile-tests.am
index 7ca4b63..d1a8803 100644
--- a/Makefile-tests.am
+++ b/Makefile-tests.am
@@ -65,7 +65,7 @@ gpginsttest_trusteddir = $(pkglibexecdir)/installed-tests/gpghome/trusted
 gpginsttest_trusted_DATA = tests/gpghome/trusted/pubring.gpg
 
 install-gpg-data-hook:
-       ln -s trusted/pubring.gpg $(DESTDIR)$(gpginsttestdir)/pubring.gpg 
+       ln -sf trusted/pubring.gpg $(DESTDIR)$(gpginsttestdir)/pubring.gpg 
 INSTALL_DATA_HOOKS += install-gpg-data-hook
 
 %.test: tests/%.sh Makefile