Fixes the following build error:
vendor/lineage/build/soong/generator/generator.go:125:26: ctx.Config().BuildOsVariant undefined (type android.Config has no field or method BuildOsVariant)
Change-Id: I3385941b2931e5be8010d31f80f3aa033d0d3727
*) Similar to genrule but can be used to generate content
when the output directory and file structure are not
known ahead of time.
*) An example use case is to build kernel headers.
Change-Id: I10deb7ba8825393b0b5fdbf2d96b12ad37257e12