RFR: JDK-8300244: Replace NULL with nullptr in share/interpreter/ [v3]

[Johan Sjölen]

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

Johan Sjölen has updated the pull request incrementally with one additional commit since the last revision:

  Fix faulty macro

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/12033/files
  - new: https://git.openjdk.org/jdk/pull/12033/files/40fd5bce..7aaaec1f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12033&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12033&range=01-02

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/12033.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12033/head:pull/12033

PR: https://git.openjdk.org/jdk/pull/12033