Drop upstream patch.
Add an upstream patch fixing build without python.
Add two more patches (one of them upstream) fixing cross compile of the
python client library.
Enable devinput and uinput unconditionally to suppress non cross compile
compatible host checks.
Set DEVINPUT_HEADER to target header of input events to avoid use of
host header.
Add python3 as optional dependency.
Cc: Rhys Williams <github@wilberforce.co.nz>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
64043653cb