buildhistory.bbclass: Create a files-in-<pkg>.txt containg recipe's pkg files
A file similar (in format) to files-in-image.txt is created for each
recipe's build package. This would allow to easily see what the
recipe's package may install when including it into an image.
These files reside on the specific buildhistory recipe package (i.e.
buildhistory/packages/i586-poky-linux/busybox/busybox-dev/files-in-busybox-dev.txt
for busybox-dev package)
[YOCTO #5870]
Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
