Update sanitize property format

Change-Id: I2fd35d6d85c7da7e96ffcefcd81350c836f0db9c
diff --git a/libc/Android.bp b/libc/Android.bp
index 2fb4984..b453d32 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -82,7 +82,9 @@
 
     stl: "none",
     system_shared_libs: [],
-    sanitize: ["never"],
+    sanitize: {
+        never: true,
+    },
     native_coverage: false,
 }
 
@@ -1481,6 +1483,7 @@
 // ========================================================
 
 cc_library_static {
+    defaults: ["libc_defaults"],
     arch: {
         arm: {
             srcs: ["arch-arm/syscalls/**/*.S"],