RFR: Here are some easy patches

[Martin Buchholz]

Off by one pixel!

8202397: Typo in X-Buffer javadoc
http://cr.openjdk.java.net/~martin/webrevs/jdk/X-Buffer-typo/
https://bugs.openjdk.java.net/browse/JDK-8202397

Fixes a long-term micro-embarrassment:

8201634: Random seedUniquifier uses incorrect LCG
http://cr.openjdk.java.net/~martin/webrevs/jdk/Random-Ecuyer/
https://bugs.openjdk.java.net/browse/JDK-8201634

An obvious optimization:

8202398: Optimize Arrays.deepHashCode
http://cr.openjdk.java.net/~martin/webrevs/jdk/deepHashCode-optimize/
https://bugs.openjdk.java.net/browse/JDK-8202398