cbor: fix core test-check*

This patch fixes couple of test-check* tests by making sure they skip
testing the third party library cbor.

Differential Revision: https://phab.mercurial-scm.org/D2751

tests/test-check-py3-compat.t

@@ -5,6 +5,7 b''
 
   $ testrepohg files 'set:(**.py)' \
   > -X hgdemandimport/demandimportpy2.py \
+  > -X mercurial/thirdparty/cbor \
   > | sed 's|\\|/|g' | xargs $PYTHON contrib/check-py3-compat.py
   contrib/python-zstandard/setup.py not using absolute_import
   contrib/python-zstandard/setup_zstd.py not using absolute_import

tests/test-check-pyflakes.t

@@ -16,6 +16,7 b' run pyflakes on all tracked files ending'
   $ testrepohg locate 'set:**.py or grep("^#!.*python")' \
   > -X hgext/fsmonitor/pywatchman \
   > -X mercurial/pycompat.py -X contrib/python-zstandard \
+  > -X mercurial/thirdparty/cbor \
   > 2>/dev/null \
   > | xargs pyflakes 2>/dev/null | "$TESTDIR/filterpyflakes.py"