Conditionally support binary reproducibility of rootfs images.
If REPRODUCIBLE_TIMESTAMP_ROOTFS is specified then:
1. set /etc/timestamp to a reproducible value
2. set /etc/version to a reproducible value
3. set /etc/gconf: set mtime in all %gconf.xml to reproducible values
The reproducible value is taken from the variable REPRODUCIBLE_TIMESTAMP_ROOTFS.
[YOCTO #11176]
[YOCTO #12422]
Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
