[foreign-jextract] RFR: 8242376: update jextract samples to avoid --filter option

[Athijegannathan Sundararajan]

removed --filter option. added lapack sample.
Note: lapack still uses --filter because of issue with Complex type.

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Commit messages:
 - 8242376: update jextract samples to avoid --filter option

Changes: https://git.openjdk.java.net/panama-foreign/pull/106/files
 Webrev: https://webrevs.openjdk.java.net/panama-foreign/106/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8242376
  Stats: 179 lines in 2 files changed: 163 ins; 12 del; 4 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/106.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/106/head:pull/106

PR: https://git.openjdk.java.net/panama-foreign/pull/106