Writes build information to target filesystem on /etc/build such as enabled
layers, their current status and commit.
squashspaces was moved to oe/utils.py to make it available to different classes
and avoid code duplication.
[YOCTO #6770]
(From OE-Core rev: c9cc652e88ddedddf8a2f23fb9b8c024616526d7)
Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>