simple-mapping: use host tmp dir
simple-mapping: use host tmp dir

Some people compile and run stuff from /tmp.

Signed-off-by: Felipe Contreras <de77a8b9cd239b204c19c52ed62e48ab47243362@gmail.com>

OlegGirko/ldbox,freedesktop-unofficial-mirror/sbox2,lbt/scratchbox2,neeraj9/sbox2,h113331pp/scratchbox2,OlegGirko/ldbox,freedesktop-unofficial-mirror/sbox2,ldbox/ldbox,loganchien/scratchbox2,OlegGirko/ldbox,loganchien/scratchbox2,lbt/scratchbox2,h113331pp/scratchbox2,loganchien/scratchbox2,BinChengfei/scratchbox2,freedesktop-unofficial-mirror/sbox2,h113331pp/scratchbox2,neeraj9/sbox2,BinChengfei/scratchbox2,BinChengfei/scratchbox2,h113331pp/scratchbox2,madscientist42/scratchbox2,OlegGirko/ldbox,ldbox/ldbox,loganchien/scratchbox2,madscientist42/scratchbox2,OlegGirko/ldbox,ldbox/ldbox,lbt/scratchbox2,h113331pp/scratchbox2,ldbox/ldbox,neeraj9/sbox2,loganchien/scratchbox2,madscientist42/scratchbox2,loganchien/scratchbox2,BinChengfei/scratchbox2,BinChengfei/scratchbox2,madscientist42/scratchbox2,madscientist42/scratchbox2,freedesktop-unofficial-mirror/sbox2,ldbox/ldbox,OlegGirko/ldbox,madscientist42/scratchbox2,neeraj9/sbox2,lbt/scratchbox2,freedesktop-unofficial-mirror/sbox2,BinChengfei/scratchbox2,ldbox/ldbox,neeraj9/sbox2,neeraj9/sbox2,freedesktop-unofficial-mirror/sbox2,h113331pp/scratchbox2,lbt/scratchbox2