* ld-elfvers/vers.exp (build_vers_lib): Support linking against
more than one libraries.
Add "vers20a" and "vers20" tests for common symbols.
* ld-elfvers/vers20.c: New.
* ld-elfvers/vers20.dsym: New.
* ld-elfvers/vers20.map: New.
* ld-elfvers/vers20.ver: New.
* ld-elfvers/vers20a.ver: New.
* ld-bootstrap/bootstrap.exp: Rebuild tmpdir/ld2 with tmpdir/ld3
on Linux/mips.
* ld-elfvers/vers.exp: Also run on istarget Linux/mips.
* ld-elfvsb/elfvsb.exp: Likewise.
* ld-shared/shared.exp: Likewise.
* ld-selective/selective.exp: Mark selective2, selective3,
selective4 and selective5 xfail on Linux/mips.
* ld-shared/main.c: Skip invalid -Bsymbolic tests on Linux/mips.
* symbolic.dat: Remove invalid -Bsymbolic tests on Linux/mips.
* ld-srec/srec.exp: Add Linux/mips to xfail.
* ld-elfvers/vers.exp: Revert the last change.
* ld-elfvers/vers2.ver: Put back "tmpdir/" the version
references.
* ld-elfvers/vers3.ver: Likewise.
* ld-elfvers/vers6.ver: Likewise.
* ld-elfvers/vers18.ver: Likewise.
* ld-bootstrap/bootstrap.exp: Rebuild tmpdir/ld2 with tmpdir/ld3
for -static on ia64.
* ld-checks/checks.exp: Don't run on ia64-*-elf* nor
ia64-*-linux*.
* ld-elfvers/vers.exp: Also run ia64-*-elf* and ia64-*-linux*.
* ld-elfvsb/elfvsb.exp: Use i?86-*-*. Also run on ia64-*-linux*.
Set up expected failures for ia64-*-linux*.
* ld-shared/shared.exp: Likewise.
