c2a: Crate: Parse unquoted rustc args

Prevent the script from missing flags (minus-prefixed arguments) due to
the CLI argument being quoted (making the "-" its second character).

This removes the need to manually unquote the args in the few cases
where the code already handles them being in quotes.

Bug: 243662244
Test: -
Change-Id: I37b9aa96dcbbeb04616bddfca657d066b998d7c7
1 file changed