NetlinkEvent: use isKernel64Bit in KernelUtils.h

Now that the code has moved, delete the local implementation in favor of
the common one.

Test: builds
Change-Id: Ic29d7c9bcd3d623204f3e4de3a3434483021cbac
diff --git a/libsysutils/Android.bp b/libsysutils/Android.bp
index 5f472b2..1b41a6b 100644
--- a/libsysutils/Android.bp
+++ b/libsysutils/Android.bp
@@ -29,6 +29,10 @@
         "liblog",
     ],
 
+    header_libs: [
+        "bpf_headers",
+    ],
+
     export_include_dirs: ["include"],
 
     tidy: true,