[boost] run_tests.sh portability fix

From: Jonathan Wakely (cow_at_[hidden])
Date: 2005-09-21 17:34:10

(sorry for not putting a library name in the subject line, I'm not sure
what to put for this)

Hi,

tools/regression/run_tests.sh uses the "export x=y" syntax, which is not
supported by /bin/sh on Solaris9 (and probably other systems.)

This means "sh run_tests.sh" or "chmod u+x run_tests.sh; ./run_tests.sh"
won't work, you must use /usr/xpg4/bin/sh or another, better, sh.

The attached patch fixes the problem, at only a slight readability cost.
Is this OK to apply?

jon