rust: Don't pass crt objects for stubs

We don't need to pass crt objects to generate stubs, and doing so
results in missing symbol errors at link time.

Bug: 203478530
Test: m <rust stubs_library>
Change-Id: Id400ae2db2530f84cea3b0a5cda4d9841d7a6985
diff --git a/cc/builder.go b/cc/builder.go
index 5325116..27c847f 100644
--- a/cc/builder.go
+++ b/cc/builder.go
@@ -852,7 +852,7 @@
 }
 
 func BuildRustStubs(ctx android.ModuleContext, outputFile android.ModuleOutPath,
-	crtBegin, crtEnd android.Paths, stubObjs Objects, ccFlags Flags) {
+	stubObjs Objects, ccFlags Flags) {
 
 	// Instantiate paths
 	sharedLibs := android.Paths{}
@@ -862,6 +862,8 @@
 	deps := android.Paths{}
 	implicitOutputs := android.WritablePaths{}
 	validations := android.Paths{}
+	crtBegin := android.Paths{}
+	crtEnd := android.Paths{}
 	groupLate := false
 
 	builderFlags := flagsToBuilderFlags(ccFlags)