Makefile.am: ignore generated files from code coverage report
Makefile.am: ignore generated files from code coverage report

Signed-off-by: Enrico Jorns <a2e5f936c390f36494e46e71bcfbe365bb1e8c49@pengutronix.de>

ejoerns/rauc,rauc/rauc,rauc/rauc,jluebbe/rauc,ejoerns/rauc,jluebbe/rauc,rauc/rauc,jluebbe/rauc,ejoerns/rauc