Update some files in GDB that were accidently left with a GPL v2
copyright header.
Update some files where the copyright notice still provides the
old contact info, using the approach for providing the FSF's contact
info.
gdb/ChangeLog:
* acinclude.m4: Update contact info in copyright notice.
gdb/doc/ChangeLog:
* refcard.tex: Update copyright notice to GPL v3 or later.
Update contact info.
gdb/testsuite/ChangeLog:
* dg-extract-results.sh: Update contact info in copyright notice.
* gdb.arch/mips-octeon-bbit.exp: Update copyright notice to
GPL v3 or later. Update contact info.
* gdb.fortran/logical.f90, gdb.threads/watchpoint-fork-child.c,
gdb.threads/watchpoint-fork-mt.c,
gdb.threads/watchpoint-fork-parent.c,
gdb.threads/watchpoint-fork-st.c,
gdb.threads/watchpoint-fork.h: Likewise.
