Renderscript: rename .rs extension to .rscript

Reserve .rs extension for Rust.

Bug: 137365032
Test: make checkbuild
Test: cd frameworks/compile/slang/tests
    ./slang_tests.py
    Test: atest CtsRenderscriptTestCases
    Test: CtsRsCppTestCases

Change-Id: I0458009b8bb64a012fece364835d5b78d52e15e9
Merged-In: I0458009b8bb64a012fece364835d5b78d52e15e9
diff --git a/cc/rs.go b/cc/rs.go
index fbc6bfb..5951edb 100644
--- a/cc/rs.go
+++ b/cc/rs.go
@@ -51,7 +51,7 @@
 		"depFiles", "outDir", "rsFlags", "stampFile")
 )
 
-// Takes a path to a .rs or .fs file, and returns a path to a generated ScriptC_*.cpp file
+// Takes a path to a .rscript or .fs file, and returns a path to a generated ScriptC_*.cpp file
 // This has to match the logic in llvm-rs-cc in DetermineOutputFile.
 func rsGeneratedCppFile(ctx android.ModuleContext, rsFile android.Path) android.WritablePath {
 	fileName := strings.TrimSuffix(rsFile.Base(), rsFile.Ext())