Add a patch to address two determinism issues and allow reproducible
builds.
Also strip full paths we don't need out of some ptest files,
we can use the installed binaries.
(From OE-Core rev: 14e7cc6c6040b983024bec56fbd32d9101507ff0)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>