RFR (XS) 8078295 - hotspot test_env.sh can set VM_CPU incorrectly

[Ioi Lam]

Please review a very small fix:

http://cr.openjdk.java.net/~iklam/8078295_test_env_sh.01/

Bug: [TESTBUG] hotspot test_env.sh can set VM_CPU incorrectly

     https://bugs.openjdk.java.net/browse/JDK-8078295

Summary of fix:

     test_env.sh uses the following to get information such as VM_CPU

         ${TESTJAVA}${FS}bin${FS}java ${TESTOPTS} -Xinternalversion > 
vm_version.out 2>&1

         VM_CPU="unknown"
         grep "arm" vm_version.out > ${NULL}
         if [ $? = 0 ]
         then
           VM_CPU="arm"
         fi

     However, the internal version may contain arbitrary text (from the 
user name and pwd)
     such as "arm", which would cause VM_CPU to have incorrect value.

     The fix is to filter out the arbitrary text using a sed script 
(please see the bug report
     for details and sample output):

         ${TESTJAVA}${FS}bin${FS}java ${TESTOPTS} -Xinternalversion \
             | sed -e 's/[(][^)]*[)]//g' -e 's/ by "[^"]*"//g' \
             > vm_version.out 2>&1

Tests:

     JPRT
     RBT, with the following tests
        hotspot/test/:hotspot_all
        vm.parallel_class_loading.testlist
        vm.regression.testlist
        vm.runtime.testlist
        vm.tmtools.testlist)

Thanks
- Ioi