[PATCH buildfix-svn] tests: fix test-convert-hg-svn.t for e34abf9e8c

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1505503981 14400
#      Fri Sep 15 15:33:01 2017 -0400
# Node ID 6527d101d236a8e54225772f077f3a175bf17b75
# Parent  99a25fd51eee06baf00117114f84b630dd75f15e
tests: fix test-convert-hg-svn.t for e34abf9e8c

For some reason this test should have been specifying
convert.svn.trunk all along, but the listed commit was what broke
things.

diff --git a/tests/test-convert-hg-svn.t b/tests/test-convert-hg-svn.t
--- a/tests/test-convert-hg-svn.t
+++ b/tests/test-convert-hg-svn.t
@@ -8,6 +8,8 @@
   > [extensions]
   > convert =
   > mq =
+  > [convert]
+  > svn.trunk =
   > EOF
 
   $ SVNREPOPATH=`pwd`/svn-repo