resend: SUSv3 touch

[walter harms]

Hi List,
this is the busybox version of a SUSv3 touch.
The code is basicly indentical to the last version
i posted some time ago. I have removed some deadcode
and a debug printf statement

re,
 wh

   text    data     bss     dec     hex filename
    940       0       0     940     3ac touch.o
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