MAINTAINERS: add ASLR maintainer

Since achieving the full ASLR by merging the PIE randomization in commit
cc503c1b43 ("x86: PIE executable randomization"), I have been dealing with
most (if not all) of the bugreports reported against userspace address
space randomization, so it might be a good idea to provide a decent
contact point in MAINTAINERS.

Signed-off-by: Jiri Kosina <[e-mail]>
Cc: Josh Boyer <[e-mail]>
Cc: Nicolas Pitre <[e-mail]>
Cc: Ingo Molnar <[e-mail]>
Cc: Russell King <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

MAINTAINERS

···
 S:	Supported
 F:	drivers/input/touchscreen/ad7879.c
 
+ADDRESS SPACE LAYOUT RANDOMIZATION (ASLR)
+M:	Jiri Kosina <[e-mail]>
+S:	Maintained
+
 ADM1025 HARDWARE MONITOR DRIVER
 M:	Jean Delvare <[e-mail]>
 L:	[e-mail]