scripts: Remove gcc-wrapper.py

This adds an unnecessary dependency on Python when regular -Werror will do fine.

Change-Id: I81f0e52e7270923f7e3d30a79ec9e9205d47ae0b
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: PIPIPIG233666 <pig.priv@gmail.com>