(runtest): Set exit status to 2 if there is any error sourcing
the Tcl scripts.
* lib/framework.exp (unknown): Likewise, set exit status to 2.
* doc/runtest.1: Clarify exit status codes.
* NEWS: Update.
testsuite from SUBDIRS, so they don't get built via "make all".
* Makefile: All Makefiles regenerated.
* debian/changelog: Update version for 1.4.2 release.
* redhat/dejagnu.spec: Update version for 1.4.2 release.
toggle whether Tcl script bugs in test drivers should be
propogated as an error to the shell.
* lib/dejagnu.exp: Trim off test state part of the message, so we
don't duplicate it.