Update Android.bp to match Android.mk

Change-Id: Ib5bbe66a398734b6db9a40d51f2849d1531853ef
diff --git a/libc/Android.bp b/libc/Android.bp
index ca926d6..4cae16c 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -385,6 +385,7 @@
     cflags: [
         "-Wno-sign-compare",
         "-Wno-uninitialized",
+        "-Wno-unused-parameter",
         "-DPOSIX_MISTAKE",
         "-include netbsd-compat.h",
     ],