Remove Android.bp rules for spirv-llvm.

Bug: http://b/118818878
Test: RS CTS tests on aosp_sailfish.
Change-Id: Ic2420c978387bf07bbb0713ac175bb032137aa64
diff --git a/Android.bp b/Android.bp
index 7866be1..b8639b2 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,4 +1,10 @@
+/*
+
+This project is being removed from the default manifest.
+
 subdirs = [
     "lib/SPIRV",
     "tools/llvm-spirv",
 ]
+
+*/