Add primitive type patterns

[johnlcox]

Is there any value in creating actual primitive patterns similar to what Java 8 did with classes like IntFunction? I could create IntPattern and IntConsumablePattern for each primitive type. It's probably best to create some benchmarks to compare how bad the autoboxing will be using just Pattern and ConsumablePattern.

[johnlcox]

Based on the benchmarks in 3f27ea4c76709574f7e68caaf6c82d7ab514d2e9 and the fact that each primitive type will require about 6 classes it doesn't seem worth it to add primitive type patterns at this time.

[johnlcox]

Reopening and using this to track adding boxed primitive patterns. If actual primitive patterns are needed at a later date a separate issue can be logged for that.