Merge branch 'tizen_base' into tizen_3.0_base

Merge branch 'tizen_base' into tizen_3.0_base

Only use multi thread support with liblzma >= 5.2.0
prevent exceeding 32 bit memory limitations with multithreaded xz compression
Add support for multithreaded xz compression
add support for setting xz memlimit
add rpmlog(RPMLOG_ERR, ...) for liblzma return codes
reflect default xz & lzma compression level changes in macros as well
lowest xz compression level is '0'
really default to default XZ compression level

Change-Id: Iafc096e455b157c249c49ba5da9c9ec41f010da2
Signed-off-by: Dongkyun, Son <dongkyun.s@samsung.com>