[analyzer] Insert checker options into AnalyzerOption::ConfigTable

The more entries we have in AnalyzerOptions::ConfigTable, the more helpful
debug.ConfigDumper is. With this patch, I'm pretty confident that it'll now emit
the entire state of the analyzer, minus the frontend flags.

It would be nice to reserve the config table specifically to checker options
only, as storing the regular analyzer configs is kinda redundant.

Differential Revision: https://reviews.llvm.org/D57922

llvm-svn: 361006