1) Cleanup an ugly hyper-nested code in Makefile (now only the arith.
   expression is passed through the host bash).

2) Fix a problem with GCC 2.95: according to a report from Raphael Bossek,
   .remap_data : { arch/um/sys-SUBARCH/unmap_fin.o (.data .bss) } is expanded
   into: .remap_data : { arch/um/sys-i386 /unmap_fin.o (.data .bss) }

(because I didn't use ## to join the two tokens), thus stopping linking.  Pass
the whole path from the Makefile as a simple and nice fix.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Raphael Bossek <raphael.bossek@gmx.de>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>