ec94351a5e
RTEMS 5.x moved the PC BSP to 686. This commit makes the EPICS target match; RTEMS-pc386 and the -qemu variant can only be built when RTEMS_VERSION != 5, whereas RTEMS-pc686 and its -qemu version will only build when RTEMS_VERSION == 5 (there are checks with descriptive errors included). makeTestFile.pl was also reformatted and modified to use exec to run tests on non-Windows hosts as required by the Perl test harness.