Allow vndk library dependecies to dump abi again.

As a part of the fix for bug 38304436, the condition for dumping abi for
a source file was reduced to : if the source file belongs to a library
belonging the vndk or the llndk, dump the abi. This needs to be changed back to:
if the source file comes through a dependency of a vndk library (static,
whole static or source), whether or not the dependency may be vndk-enabled, dump
the abi.

Test: mm -j64 in external/libcxx.
Without the change, libc++ does not produce any abi dump, since it
depends on whole static libraries not marked vndk enabled. After the
change, libc++ has an abi dump combining abi exposed by whole static,
static and source dependencies.

Bug: 38304436

Change-Id: Ida3dceeca11342756191f316bee74ea08bcdd984

cc/library.go

@@ -351,7 +351,7 @@ func (library *libraryDecorator) compile(ctx ModuleContext, flags Flags, deps Pa
 		}
 		return Objects{}
 	}
-	if ctx.createVndkSourceAbiDump() {
+	if ctx.createVndkSourceAbiDump() || library.sabi.Properties.CreateSAbiDumps {
 		exportIncludeDirs := android.PathsForModuleSrc(ctx, library.flagExporter.Properties.Export_include_dirs)
 		var SourceAbiFlags []string
 		for _, dir := range exportIncludeDirs.Strings() {