don't zero pad addresses in segfault message. Matches the other trap
messages. This leaves some more space for the new file name.

[ mingo: arch/x86 adaptation ]
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>