BPF: remove duplicate cflags and update btf flags. am: e0a0789c53 am: e2922ebf9e

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/3195892

Change-Id: Ie83b7fd6d9879c307dc4aaae957ab64db610e432
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/progs/Android.bp b/progs/Android.bp
index b044eb0..78f3049 100644
--- a/progs/Android.bp
+++ b/progs/Android.bp
@@ -30,8 +30,5 @@
 bpf {
     name: "bpfRingbufProg.o",
     srcs: ["bpfRingbufProg.c"],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
+    btf: false,
 }