tool distro support for maemo mapping mode
tool distro support for maemo mapping mode

MAEMO_TOOLS environment variable can be used to point sb2 to use
tools from some arbitrary directory instead of the root of the host
system. Useful for controlling the build environment.

Signed-off-by: Lauri Leukkunen <9b23c45cf0fb6926402fd5ded28029be7ec8bbef@rahina.org>

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