tests: adapt test-check-pylint to run on Windows

The line endings are explicitly converted because this was ending up with
'\r (no-eol) (esc)' lines, in addition to the usual '\r (esc)' lines.  I've seen
the fakerc output on other recently installed systems though (10.13 and/or
Fedora 26).  Unfortunately, the output here uses '\\' on Windows, so glob away
the whole path.

tests/test-check-pylint.t

@@ -1,21 +1,22 b''
 #require test-repo pylint hg10
 
 Run pylint for known rules we care about.
 -----------------------------------------
 
 There should be no recorded failures; fix the codebase before introducing a
 new check.
 
 Current checks:
 - W0102: no mutable default argument
 
   $ touch $TESTTMP/fakerc
   $ pylint --rcfile=$TESTTMP/fakerc --disable=all \
   >   --enable=W0102,C0321 \
   >   --reports=no \
   >   --ignore=thirdparty \
-  >   mercurial hgdemandimport hgext hgext3rd
+  >   mercurial hgdemandimport hgext hgext3rd | sed 's/\r$//'
+  Using config file *fakerc (glob) (?)
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