lib/oe/patch: handle encoding differences in patch files
With Python 3, the encoding of a file is significant; several recipes in
OE-Core have patches which are not fully utf-8 decodable e.g. man,
lrzsz, and gstreamer1.0-libav, leading to errors when using devtool's
modify, upgrade or extract subcommands on these recipes. To work around
this, try reading the patch file as utf-8 first and if that fails try
latin-1 before giving up.
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
