Log Message:
php*: disable global regs on i386.
Fixes PR pkg/53222 that resurfaced

Remove the previous workaround to add GCC_REQD, which isn't sufficient
any more, possibly due to enabling ssp/fortify?

XXX bumping PKGREVISION might not be sufficient, for the same reason the
GCC_REQD had to be moved to Makefile.php, it affects modules too.