[PATCH 1 of 2 STABLE] test-obsmarker-template: add missing HGENCODING=latin-1

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1532760591 -32400
#      Sat Jul 28 15:49:51 2018 +0900
# Branch stable
# Node ID 2b7ce7b55514e248a3247f135f1938090ff19045
# Parent  0f948d821fe7e5ed18e6106c162375a11e8b0546
test-obsmarker-template: add missing HGENCODING=latin-1

It just worked by accident on some Linux sh.

diff --git a/tests/test-obsmarker-template.t b/tests/test-obsmarker-template.t
--- a/tests/test-obsmarker-template.t
+++ b/tests/test-obsmarker-template.t
@@ -2600,7 +2600,7 @@ Test metadata encoding (issue5754)
   $ mkcommit ROOT
   $ HGENCODING=latin-1 HGUSER="`cat test1`" mkcommit A0
   $ echo 42 >> A0
-  $ hg amend -m "A1" --note "`cat test2`"
+  $ HGENCODING=latin-1 hg amend -m "A1" --note "`cat test2`"
   $ HGENCODING=latin-1 hg amend -m "A2" \
   > --config devel.user.obsmarker="`cat test2`"
   $ mkcommit B0