Log Message:
lang/gnat-aux: Fix introduced gnat.dg test failure on i386-netbsdelf-*

Previously the Ada testsuite was given unlimited stack resources for the
x86_64 arch on NetBSD.  Since all platforms now need unlimited stack
resources to build gnat-aux due to the addition of <platform>-stdint.h
header, this platform specific restriction on the Ada testsuite was
removed.

Unfortunately that resulted in a new stack test failure on i386 NetBSD
platforms (gnat.dg/task_stack_align.adb execution test), so the original
restriction seen in gnat-aux-20110627 was restored.  Now i386 NetBSD
once again pass all gnat.dg tests.  This is strictly a testsuite issue
so no PKGREVISION bump is necessary.