fix process010 test run on Solaris where false exits with status 255

Solaris provides false command in /usr/bin/false which is executed by this testcase and which exits with status code 255. On the other hand Solaris' shell's false builtin exits with status code 1 so it's quite a mess actually, but anyway false should exit with something different from 0 and both fulfil this so I provide this to make the test pass on Solaris.