toolc/nolibc: arch-*.h: clean up whitespaces after __asm__

replace "__asm__  volatile" with "__asm__ volatile" and insert necessary
whitespace before "\" to make sure the lines are aligned.

    $ sed -i -e 's/__asm__  volatile ( /__asm__ volatile (  /g' tools/include/nolibc/*.h

Note, arch-s390.h uses post-tab instead of post-whitespaces, must avoid
insert whitespace just before the tabs:

    $ sed -i -e 's/__asm__  volatile (\t/__asm__ volatile (\t/g' tools/include/nolibc/arch-*.h
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>