Remove another bashism from run_tests.sh

Current we check for various error codes with [ $x == "NN" ].  However
'==' is not actually a correct operator for the [ (test) command.  It
should be either '=' for string comparison or '-eq' for integer
comparison.  It appears that the bash builtin version of test
implements '==' though, so we were getting away with it, as long as
/bin/sh was bash - or the testsuite generated no errors.

This patch fixes the usage of test so that it should work on non-bash
shells.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
1 file changed