testsuite: outofmem

[Manuel M T Chakravarty]

The recently added 'outofmem' test doesn't work on MacOS.  I get

Actual stderr output differs from expected:
--- ./outofmem.stderr.normalised        2007-09-03 
13:09:04.000000000 +1000
+++ ./outofmem.run.stderr.normalised    2007-09-03 
13:09:04.000000000 +1000
@@ -1 +1 @@
-outofmem: out of memory
+outofmem: memory allocation failed (requested 1074790400 bytes)

Ie, the error message is syntactically different.  I am unsure how 
to handle error message differing by arch in the testsuite.

Manuel