Add riscv64 support for libcutils

Signed-off-by: Liu Cunyuan <liucunyuan.lcy@linux.alibaba.com>
Signed-off-by: Mao Han <han_mao@linux.alibaba.com>
Change-Id: I3dbe6b6d79c2655ab76f48e48fd22ab72d761dfd
diff --git a/libcutils/Android.bp b/libcutils/Android.bp
index fde30ad..753edf7 100644
--- a/libcutils/Android.bp
+++ b/libcutils/Android.bp
@@ -219,6 +219,11 @@
                 misc_undefined: ["integer"],
             },
         },
+        android_riscv64: {
+            sanitize: {
+                misc_undefined: ["integer"],
+            },
+        },
 
         android_x86: {
             // TODO: This is to work around b/29412086.