r8: Update R8 to 2.0.13-dev

Locally built with java warnings disabled and these commits from master:

a6d9f379e Fix missing type propagation during trivial phi removal
389952019 Turn off Kotlin metadata rewriting.
e36a23ecf Unique names for overloads by separating naming and reservation
a2a59f996 Don't do ClassForName rewriting if the class is in a feature.
8a0789cc0 Disentangle IR conversion from lambda rewriter.
17cda1c96 Turn off uninstantiated type optimization for interfaces
80b189728 BackportedMethodRewriter performance
50289fc44 Extend @Metadata compatibility checks to JVM extensions and properties.

Change-Id: I08da5ee7616d03ef786fa0b0d9b2891d1cbe10a3
Signed-off-by: mydongistiny <jaysonedson@gmail.com>
2 files changed