git: openjdk/leyden: created branch pregenerate-lambdas based on the branch master containing 7 unique commits

[duke]

The following commits are unique to the pregenerate-lambdas branch:
========================================================
598d79ba: Support primitive wrapper look up with ClassDesc
72047d4b: Support type conversion on ClassDescs
d26df27d: Add BytecodeDescriptr::unparse of ClassDesc
a0623014: Convert Lambdas to non-lambda code
614ff790: Remove extraneous "Info" and use descriptorString
79047e66: Extend classfile APi for better ClassEntry lists
493d81ad: initial lambda pre-generator jlink plugin