subrepo: force en_US.UTF-8 locale when calling svn
Parser only knows about en_US output. Forcing the encoding to UTF-8 might not
be the best thing to do since the caller may receive some of the subversion
output, but at least it should prevent conversion errors from svn client.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.