[foreign-jextract] [Rev 01] RFR: adding libgit2 sample.

[Athijegannathan Sundararajan]

> GitClone.java is a simple Java program to clone a repo from Github.

Athijegannathan Sundararajan has updated the pull request incrementally with one additional commit since the last
revision:

  oops. fixed main class name to be GitClone

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Changes:
  - all: https://git.openjdk.java.net/panama-foreign/pull/182/files
  - new: https://git.openjdk.java.net/panama-foreign/pull/182/files/ca93d78e..2f4aced8

Webrevs:
 - full: https://webrevs.openjdk.java.net/panama-foreign/182/webrev.01
 - incr: https://webrevs.openjdk.java.net/panama-foreign/182/webrev.00-01

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/panama-foreign/pull/182.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-foreign pull/182/head:pull/182

PR: https://git.openjdk.java.net/panama-foreign/pull/182