Disable sizeof-array-div locally

* to enable sizeof-array-div globally

Bug: 148815709
Test: make
diff --git a/Android.bp b/Android.bp
index be71243..d2a31f7 100644
--- a/Android.bp
+++ b/Android.bp
@@ -14,6 +14,7 @@
         "-Wno-for-loop-analysis",
         "-Wno-unused-const-variable",
         "-Wno-null-pointer-arithmetic",
+        "-Wno-sizeof-array-div", // found in pcpprngsetca.c:90
         "-fexceptions",
         "-fPIC",
         "-O2",