Fix test 5558 for Mac OS X 10.5

The attached patch fixes

=====> 5558(threaded2) 207 of 3086 [0, 0, 0]
cd ./concurrent/should_run && '/Users/thorkilnaur/tn/GHCGitRepository/ghc-working/bindisttest/install dir/bin/ghc' -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-package-conf -rtsopts -fno-ghci-history  -o 5558 5558.hs -O -threaded -eventlog   >5558.comp.stderr 2>&1
...
cd ./concurrent/should_run && for i in `seq 1 100`; do ./5558  +RTS -N2 -ls -RTS  </dev/null >5558.run.stdout 2>5558.run.stderr || break; done
/bin/sh: seq: command not found
*** framework failure for 5558(threaded2) do_test exception :
Traceback (most recent call last):
  File "/Users/thorkilnaur/tn/GHCGitRepository/ghc-working/testsuite/driver/testlib.py", line 684, in do_test
    result = apply(func, [name,way] + args)
...
IOError: [Errno 2] No such file or directory: './concurrent/should_run/5558.run.stderr'

on

$ uname -a
Darwin thorkil-naurs-intel-mac-mini.local 9.8.0 Darwin Kernel Version 9.8.0: Wed Jul 15 16:55:01 PDT 2009; root:xnu-1228.15.4~1/RELEASE_I386 i386
$

Validated on Mac OS X 10.5. The sequence expression {1..100} works on Linux, Cygwin and FreeBSD.

Best regards Thorkil

Trac metadata

Trac field	Value
Version	7.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Test Suite
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture