Use new soong_cc_rust_prebuilt.mk

soong_{cc,rust}_prebuilt.mk has been merged. Use the new file.

Bug: N/A, clean-up
Test: m
Change-Id: I3f03e866815f6394aacd8cb0deba04f381b78c29
diff --git a/rust/androidmk.go b/rust/androidmk.go
index 7eb5dbd..ea2c497 100644
--- a/rust/androidmk.go
+++ b/rust/androidmk.go
@@ -51,7 +51,7 @@
 
 	ret := android.AndroidMkEntries{
 		OutputFile: android.OptionalPathForPath(mod.UnstrippedOutputFile()),
-		Include:    "$(BUILD_SYSTEM)/soong_rust_prebuilt.mk",
+		Include:    "$(BUILD_SYSTEM)/soong_cc_rust_prebuilt.mk",
 		ExtraEntries: []android.AndroidMkExtraEntriesFunc{
 			func(ctx android.AndroidMkExtraEntriesContext, entries *android.AndroidMkEntries) {
 				entries.AddStrings("LOCAL_RLIB_LIBRARIES", mod.Properties.AndroidMkRlibs...)