ci: Set git core.autocrlf to input

In order for one of the patches to be be cleanly applied, git config
option `core.autocrlf` must be set to value `input`.

The file `src/transport_interface/transport_interface_test.c` has `CRLF`
line ending and patching it fails if `core.autocrlf` is not set to
`input`.

Signed-off-by: Devaraj Ranganna <devaraj.ranganna@arm.com>