Fix android DEBUG build.

runtime/vm/thread_interrupter_android.cc

Index: runtime/vm/thread_interrupter_android.cc
diff --git a/runtime/vm/thread_interrupter_android.cc b/runtime/vm/thread_interrupter_android.cc
index a459eb23c785df43aa211c13f0d754928fac97a1..493155853cd19316500f897a7ea2d598589c9f30 100644
--- a/runtime/vm/thread_interrupter_android.cc
+++ b/runtime/vm/thread_interrupter_android.cc
@@ -50,7 +50,7 @@ void ThreadInterrupter::InterruptThread(InterruptableThreadState* state) {
     OS::Print("ThreadInterrupter interrupting %p\n",
               reinterpret_cast<void*>(state->id));
   }
-  int resut = syscall(__NR_tgkill, getpid(), state->id, SIGPROF);
+  int result = syscall(__NR_tgkill, getpid(), state->id, SIGPROF);
   ASSERT(result == 0);
 }