Travis CI updates (tklengyel#709)

* Use clang-10 for scan-build

* Enable sanitize option for debug build

* Disable some errors and error limit

* Fix reorder-init-list warnings

Merge pull request tklengyel#282 from tklengyel/coverity

Coverity fixes

Merge pull request tklengyel#239 from tklengyel/check_returns

Check returns at more places

Filedelete plugin cleanup (tklengyel#208)

Merge pull request tklengyel#121 from tklengyel/timer

Only start timeout on loop start

Merge pull request tklengyel#113 from tklengyel/minor_cleanup

Only pass required structures to libdrakvuf functions

clone script update: hide xl domid test error message and remove newl…

…ine after clone id