Add patch that checks for CPP prog, which helps to resolve build
errors:
../git/configure: line 14427: CPP: command not found
| ../git/configure: line 14553: ac_fn_c_try_cpp: command not found
| ../git/configure: line 14553: ac_fn_c_try_cpp: command not found
Signed-off-by: Andrey Zhizhikin <andrey.z@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>