Add methods `floorDivExact(int,int)` and `floorDivExact(long,long)` to `java.lang.Math` and `java.lang.StrictMath`.
------------- Commit messages: - 8271225: Add floorDivExact() method to java.lang.[Strict]Math Changes: https://git.openjdk.java.net/jdk/pull/4941/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4941&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8271225 Stats: 245 lines in 3 files changed: 236 ins; 0 del; 9 mod Patch: https://git.openjdk.java.net/jdk/pull/4941.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4941/head:pull/4941 PR: https://git.openjdk.java.net/jdk/pull/4941
