RFR: 8075806: divideExact is missing in java.lang.Math [v4]

[Brian Burkhalter]

> Please consider this proposal to add `divideExact()` methods for integral data types to `java.lang.Math` thereby rounding out "exact" support to all four basic arithmetic operations.

Brian Burkhalter has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  8075806: Add StrictMath analogs

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4770/files
  - new: https://git.openjdk.java.net/jdk/pull/4770/files/60adb9e5..328e4188

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4770&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4770&range=02-03

  Stats: 7 lines in 1 file changed: 0 ins; 5 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4770.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4770/head:pull/4770

PR: https://git.openjdk.java.net/jdk/pull/4770