[analyzer] Preserve the order checkers were enabled/disabled.

In addition to r251524: preserve the order the checkers were enabled/disabled to be deterministic.
Additionally return the number of arguments read by 'ProcessArgs' - for debug purpose.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk/tools/scan-build@251552 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed