RFR: 8256508: Improve CompileCommand flag [v3]

[Nils Eliasson]

> The current implementation of compile command has two types of options. Types pre-defined options like "compileonly" and the general 'option' type.
> 
> 'option'-type are not defined, they can accidentally be used with the wrong value type, and the syntax is prone to error.
> 
> By pre-defining all compile commands used and giving them types the parsing can be simplified, proper parsing errors can be given and and reasonable syntax can be used.
> 
> This:
> -XX:CompileCommand=option,java/util/String.toString,int,RepeatCompilation,5
> 
> Is superseded by:
> -XX:CompileCommand=RepeatCompilation,java/util/String.toString,5
> 
> Attention check: Did you spot the error in the old command?
> 
> In order not to break anything - the old syntax is kept for now. But even the old command format is improved with verification for the option name and the type of the value.

Nils Eliasson has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 17 commits:

 - Merge branch 'master' into improve_compile_command
 - Exclude option is handled in compilecommand_compatibility_init
 - Make tests debug only
 - Fix typos
 - remove typo
 - Fix CompilerConfigFileWarning test
 - Fix test
 - Merge branch 'master' of https://github.com/openjdk/jdk into improve_compile_command
 - Fixed messages and help text
 - Clean up error reporting
 - ... and 7 more: https://git.openjdk.java.net/jdk/compare/7b3d0958...1995972f

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Changes: https://git.openjdk.java.net/jdk/pull/1276/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1276&range=02
  Stats: 939 lines in 22 files changed: 464 ins; 147 del; 328 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1276.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1276/head:pull/1276

PR: https://git.openjdk.java.net/jdk/pull/1276