tree 3778d606b6ec8a2bc6d08683a0f29619d2f497a3
parent 217a1e406ea3b7e1cbf228d7d4d8a4f555ba482d
author Dan Willemsen <dwillemsen@google.com> 1595039333 -0700
committer Dan Willemsen <dwillemsen@google.com> 1596754569 -0700

Reland "Support per-module MakeVars"

This allows setting per-module make variables earlier in the build,
particularly for prebuilt_build_tool users like LEX/M4/BISON (which will
come in a later CL). I moved filegroup over because it's a simpler
common interface, but it doesn't strictly need it.

Test: Inspect out/soong/make_vars-*.mk, out/soong/late-*.mk
Test: treehugger
Change-Id: I38631129d82b0aad2438e83610bb6a97568bf932