RFR: 8376665: Port fdlibm acosh to Java [v6]

[Anton Artemov]

> Hi, please consider the following changes:
> 
> This is a port of FDLIBM acosh method.

Anton Artemov has updated the pull request incrementally with one additional commit since the last revision:

  8376665: Fixed accidentally repeated testcase.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/29488/files
  - new: https://git.openjdk.org/jdk/pull/29488/files/702c955f..dd5c5f7e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=29488&range=05
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29488&range=04-05

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/29488.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/29488/head:pull/29488

PR: https://git.openjdk.org/jdk/pull/29488