RFR: 8293214: Add support for Linux/LoongArch64 [v3]

[Ao Qi]

> LoongArch is a new RISC ISA. This issue proposes adding support for Linux/LoongArch64. Upstream WebKit for LoongArch64 support is not ready, but the OpenJFX part is simple and ready. When the LoongArch64 supported Webkit is updated to OpenJFX, it is supposed to work.

Ao Qi has updated the pull request incrementally with one additional commit since the last revision:

  revert

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/888/files
  - new: https://git.openjdk.org/jfx/pull/888/files/c0bdfe96..b225c59a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=888&range=02
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=888&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/888.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/888/head:pull/888

PR: https://git.openjdk.org/jfx/pull/888