.hgignore

Fixed --repository option when handling relative path

When specifying relative path to --repository option, 'log' and
'diff' were unable to find the files specified. Here's the fix.

\.orig$
\.rej$
~$
\.so$
\.pyc$
\.swp$
\.prof$
^tests/.*\.err$
^build/
^dist/
^doc/.*\.[0-9](\.(x|ht)ml)?$
^MANIFEST$
^\.pc/
^patches/
^mercurial/__version__.py$