screen: Fix build and runtime errors with --HEAD

This fixes following problems when installing with `--HEAD`.

### Fix fail on ./configure
With current formula, build fails on `./configure` because it's not in working directory.
`configure` is generated by autoconf in `src` directory, so needs to stay there after autoconf.

### Fix fail on make
This disables parallel build.
With parallel build, it fails because of trying to compile files which depend `osdef.h` before `osdef.sh` script generates it.

### Add patch to disable error message on launch
This patch disables the error message `/var/run/utmp: No such file or directory` on launching screen.