coverage: Update scripts

- Update coverage scripts to parse new tarmac format
- Update script command line arguments to take in specific binaries to
generate report for
- Make genhtml a separate step from this script

Change-Id: I9f39b1e4f305b3428189f858088f23c979c8b9a4
Signed-off-by: Jackson Cooper-Driver <jackson.cooper-driver@arm.com>
3 files changed