Add dependency to version script when linking stub libraries

This isn't an effective issue with local builds currently, since the
version script is generated from the same rule as the sources used to
compile the objects that are also used in the link command. But if we
ever separated those paths or adopted restat, we could miss this
dependency.

This is also required for my RBE build to actually expose this file to
the link step.

Test: treehugger
Change-Id: I32bbb18cf7edddc88759d4f445d081868f3e9b44

cc/llndk_library.go

@@ -134,6 +134,7 @@ func (stub *llndkStubDecorator) link(ctx ModuleContext, flags Flags, deps PathDe
 	if !Bool(stub.Properties.Unversioned) {
 		linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String()
 		flags.LdFlags = append(flags.LdFlags, linkerScriptFlag)
+		flags.LdFlagsDeps = append(flags.LdFlagsDeps, stub.versionScriptPath)
 	}
 
 	if len(stub.Properties.Export_preprocessed_headers) > 0 {

cc/ndk_library.go

@@ -337,6 +337,7 @@ func (stub *stubDecorator) link(ctx ModuleContext, flags Flags, deps PathDeps,
 	if useVersionScript {
 		linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String()
 		flags.LdFlags = append(flags.LdFlags, linkerScriptFlag)
+		flags.LdFlagsDeps = append(flags.LdFlagsDeps, stub.versionScriptPath)
 	}
 
 	return stub.libraryDecorator.link(ctx, flags, deps, objs)

cc/vendor_public_library.go

@@ -125,6 +125,7 @@ func (stub *vendorPublicLibraryStubDecorator) link(ctx ModuleContext, flags Flag
 	if !Bool(stub.Properties.Unversioned) {
 		linkerScriptFlag := "-Wl,--version-script," + stub.versionScriptPath.String()
 		flags.LdFlags = append(flags.LdFlags, linkerScriptFlag)
+		flags.LdFlagsDeps = append(flags.LdFlagsDeps, stub.versionScriptPath)
 	}
 	return stub.libraryDecorator.link(ctx, flags, deps, objs)
 }