RFR: 8256538: Fix annoying awk warning in configure for java versions

Wed Nov 18 09:53:09 UTC 2020

The change from grep to awk in JDK-8244248 and further bug fixed in JDK-8244756 still has invalid syntax. This causes some awk (most notably gawk, the most commonly used) to complain:

gawk: cmd. line:1: warning: regexp escape sequence `"' is not a known regexp operator

This is annoying and should be fixed.

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Commit messages:
 - 8256538: Fix annoying awk warning in configure for java versions

Changes: https://git.openjdk.java.net/jdk/pull/1285/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1285&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8256538
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1285.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1285/head:pull/1285

PR: https://git.openjdk.java.net/jdk/pull/1285