testsuite exp programming issue

[Jack Howarth]

Andrew,
   I'll double check but I don't think the testcases which
use -fnext-runtime were failing when I had these changes
hardwired in for -m64. The reason is that the -fgnu-runtime
appears on the cflags and gets overridden when a specific
testcase appends -fnext-runtime because that appears last.
I'll double check and post the results of a run with these
flags hardcoded.
               Jack