Suppress null-pointer-arithmetic warning

Test: m checkbuild
Bug: 72331524
Change-Id: I52b45a84d1b0fedba4b489c53fed99b0251975d3
diff --git a/Android.bp b/Android.bp
index de7a223..5bdd4a0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -38,6 +38,7 @@
         "-Wno-missing-field-initializers",
         "-Wno-ignored-qualifiers",
         "-Wno-undefined-var-template",
+        "-Wno-null-pointer-arithmetic",
         "-fno-exceptions",
         "-fvisibility=hidden",
         "-DENABLE_DEBUGGER_SUPPORT",