test-bzr.sh, test-hg.sh: allow running from any dir

Set TEST_DIRECTORY to the t/ directory (if TEST_DIRECTORY is not
already set) so that the user doesn't already have to be in the test
directory to run these test scripts.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Based-on-patch-by: Richard Hansen <rhansen@bbn.com>
Reviewed-by: Richard Hansen <rhansen@bbn.com>
Signed-off-by: Richard Hansen <rhansen@bbn.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/remote-helpers/test-bzr.sh

@@ -5,7 +5,8 @@
 
 test_description='Test remote-bzr'
 
-. ./test-lib.sh
+test -n "$TEST_DIRECTORY" || TEST_DIRECTORY=${0%/*}/../../t
+. "$TEST_DIRECTORY"/test-lib.sh
 
 if ! test_have_prereq PYTHON
 then

contrib/remote-helpers/test-hg.sh

@@ -8,7 +8,8 @@
 
 test_description='Test remote-hg'
 
-. ./test-lib.sh
+test -n "$TEST_DIRECTORY" || TEST_DIRECTORY=${0%/*}/../../t
+. "$TEST_DIRECTORY"/test-lib.sh
 
 if ! test_have_prereq PYTHON
 then