RFR: 8256424: Move ciSymbol::symbol_name() to ciSymbols::symbol_name() [v2]

[Claes Redestad]

> This moves the mirroring of vmSymbols in ciSymbols to a separate file, ciSymbols.hpp, to reduce includes throughout hotspot (and clean up the ciSymbol namespace). In a few places code is moved from .hpp to .cpp to facilitate this.
> 
> With PCH disabled, this reduces total includes from 276949 to 276332

Claes Redestad has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 13 commits:

 - Merge branch 'master' into ciSymbols
 - @iklam reviews, additional cleanup
 - remote merge
 - Prepare for 1237 changes
 - Adjust includes after vmIntrinsic changes
 - Merge master
 - Outline is_call_site_target to remove include from ciField.hpp
 - Outline is_autobox_cache to remove include from ciField.hpp
 - Merge branch 'master' into ciSymbols
 - Fix bad definition
 - ... and 3 more: https://git.openjdk.java.net/jdk/compare/d0c52651...b8c485b9

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Changes: https://git.openjdk.java.net/jdk/pull/1256/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1256&range=01
  Stats: 182 lines in 32 files changed: 101 ins; 30 del; 51 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1256.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1256/head:pull/1256

PR: https://git.openjdk.java.net/jdk/pull/1256