commit f960257c1445149aebbfde386e9330a0c82f2265
author Colin Cross <ccross@android.com> Thu Oct 12 13:34:40 2017 -0700
committer Colin Cross <ccross@android.com> Mon Oct 16 17:55:24 2017 -0700
tree 071a15115144b6670f29497c36d3097382e9eace
parent ff806ece8da92006a640a62fb1adaaf1cc154723

Use system modules generated by soong when using javac -target 1.9

Soong has support for building system modules.  Use the directories
produced by Soong with --system to replace -bootclasspath arguments
when using javac -target 1.9.

Since soong can't generate current SDK stubs yet, and no existing
SDK stubs need -target, only use -target 1.9 for modules that are
not compiling against the SDK.  That means in practice the only
system modules that will be used for now is the default one,
core-system-modules.

Bug: 63986449
Test: m -j EXPERIMENTAL_USE_OPENJDK9=true makes some progress
Change-Id: I350ef50aedf36fdd72458c23d4fe8a2edf1a9a02