a few 'linux-gnu' references missed in mainline

[Mike Frysinger]

shouldnt the following be updated too with the '-linux-gnu*' to '-linux-*' 
change ?

gas/testsuite/gas/sh/basic.exp:
if [istarget "sh*-*-linux-gnu"] {

gas/testsuite/gas/vax/vax.exp:
    if { [istarget vax-*-*elf*] || [istarget vax-*-linux-gnu*] } then {
    if { [istarget vax-*-*elf*] || [istarget vax-*-linux-gnu*] } then {

ld/testsuite/ld-sh/sh.exp:
if [istarget sh*-linux-gnu] {
if [istarget sh*-linux-gnu] {

ld/testsuite/ld-srec/srec.exp:
setup_xfail "alpha*-*-elf*" "alpha*-*-linux-gnu*" "alpha*-*-gnu*"
setup_xfail "alpha*-*-elf*" "alpha*-*-linux-gnu*" "alpha*-*-gnu*"

thanks
-mike