[foreign-jextract] RFR: 8240752: jextract generates non-compilable code for special floating point values

[Athijegannathan Sundararajan]

Generating static fields of Double and Float for special values.

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Commit messages:
 - 8240752: jextract generates non-compilable code for special floating point values

Changes: https://git.openjdk.java.net/panama-foreign/pull/42/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/42/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8240752
  Stats: 140 lines in 3 files changed: 136 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/42.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/42/head:pull/42

PR: https://git.openjdk.java.net/panama-foreign/pull/42