rpms: add hgext3rd to mercurial.spec
Otherwise build process fails with somethings like this:
RPM build errors:
Installed (but unpackaged) file(s) found:
/usr/lib64/python2.7/site-packages/hgext3rd/__init__.py
/usr/lib64/python2.7/site-packages/hgext3rd/__init__.pyc
/usr/lib64/python2.7/site-packages/hgext3rd/__init__.pyo
make: *** [docker-fedora20] Error 1
#require symlink
$ origdir=`pwd`
$ hg init repo
$ cd repo
$ ln -s nothing dangling
avoid tar warnings about old timestamp
$ hg ci -d '2000-01-01 00:00:00 +0000' -qAm 'add symlink'
$ hg archive -t files ../archive
$ hg archive -t tar -p tar ../archive.tar
$ hg archive -t zip -p zip ../archive.zip
files
$ cd "$origdir"
$ cd archive
$ readlink.py dangling
dangling -> nothing
tar
$ cd "$origdir"
$ tar xf archive.tar
$ cd tar
$ readlink.py dangling
dangling -> nothing
zip
$ cd "$origdir"
$ unzip archive.zip > /dev/null 2>&1
$ cd zip
$ readlink.py dangling
dangling -> nothing
$ cd ..