RFR: JDK-8305484: Compiler::init_c1_runtime unnecessarily uses an Arena that lives for the lifetime of the process [v2]

[Justin King]

> Remove unnecessary usage of Arena for globals that live the lifetime of the process and are initialized once.

Justin King has updated the pull request incrementally with three additional commits since the last revision:

 - Remove now unused include
   
   Signed-off-by: Justin King <jcking at google.com>
 - Remove incorrect comment
   
   Signed-off-by: Justin King <jcking at google.com>
 - Fix typo
   
   Signed-off-by: Justin King <jcking at google.com>

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/13300/files
  - new: https://git.openjdk.org/jdk/pull/13300/files/09c38fd1..d1663998

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13300&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13300&range=00-01

  Stats: 5 lines in 2 files changed: 0 ins; 4 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13300.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13300/head:pull/13300

PR: https://git.openjdk.org/jdk/pull/13300