[PATCH STABLE] test-cache-abuse: correct for different hunk headers between Solaris and GNU

[danek.duvall at oracle.com]

# HG changeset patch
# User Danek Duvall <danek.duvall at oracle.com>
# Date 1464372869 25200
#      Fri May 27 11:14:29 2016 -0700
# Branch stable
# Node ID b1ffda6b55ce3f920faec1d553c9fafafb4d8c9c
# Parent  89bba2beb03ea62e7fc8bcf3272e3cda1065ad89
test-cache-abuse: correct for different hunk headers between Solaris and GNU

When diffing against an empty file, Solaris diff uses 1 to designate the
first line of the empty file (either -1,0 on the left or +1,0 on the right)
while GNU diff uses 0 (-0,0 and +0,0).  We use a glob here to make sure the
test passes with either toolchain.

I've not added tests to check-code because there are scads of places in the
tests where the GNU format is used due to that being the format that "hg
diff" and "hg export" use, and changing those to use globs seems wrong.

diff --git a/tests/test-cache-abuse.t b/tests/test-cache-abuse.t
--- a/tests/test-cache-abuse.t
+++ b/tests/test-cache-abuse.t
@@ -88,7 +88,7 @@ We currently can't detect an rbc cache w
   $ damage "log -qr branch(b2)" rbc-names-v1
   --- before	* (glob)
   +++ after	* (glob)
-  @@ -1,8 +0,0 @@
+  @@ -1,8 +?,0 @@ (glob)
   -2:5fb7d38b9dc4
   -3:60b597ffdafa
   -4:b1174d11b69e