RFR: 8299973: Replace NULL with nullptr in share/utilities/ [v4]

[Johan Sjölen]

> Do the conversion in the share/utilities sub-directory and all of its files.

Johan Sjölen has updated the pull request incrementally with two additional commits since the last revision:

 - Remove redundant assert
 - Use "null" as generic term in logs and comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12015/files
  - new: https://git.openjdk.org/jdk/pull/12015/files/992a8f6f..e35d240c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12015&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12015&range=02-03

  Stats: 5 lines in 4 files changed: 0 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/12015.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12015/head:pull/12015

PR: https://git.openjdk.org/jdk/pull/12015