RFR: JDK-8304723: Statically allocate global mutexes [v6]

[Justin King]

> Switch to statically allocate storage for all of Hotspot's global mutexes and monitors. This avoids needing to allocate each one dynamically at startup. These also live for the lifetime of the program, so this reduces any potential memory fragmention in the C heap.

Justin King has updated the pull request incrementally with one additional commit since the last revision:

  Fix spacing as requested
  
  Signed-off-by: Justin King <jcking at google.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13143/files
  - new: https://git.openjdk.org/jdk/pull/13143/files/7491f771..05ccd53f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13143&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13143&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/13143.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13143/head:pull/13143

PR: https://git.openjdk.org/jdk/pull/13143