ART: Disable sanitization for sigchainlib

It's a static library, it will bring in ASAN to mk-based binaries
that do not want to be sanitized.

Bug: 38456126
Test: m
Change-Id: I275b8dbe33149c0769e96a014b7a350389c853e8
diff --git a/sigchainlib/Android.bp b/sigchainlib/Android.bp
index 08af254..0c64b7d 100644
--- a/sigchainlib/Android.bp
+++ b/sigchainlib/Android.bp
@@ -32,6 +32,12 @@
             shared_libs: ["liblog"],
         },
     },
+    // Sigchainlib is whole-statically linked into binaries. For Android.mk-based binaries,
+    // this will drag ASAN symbols into the binary, even for modules using LOCAL_SANITIZE := never.
+    // So disable sanitization for now. b/38456126
+    sanitize: {
+        never: true,
+    },
 }
 
 // Create a dummy version of libsigchain which expose the necessary symbols