Fix bogus DCHECK and rename DidForkFromZygote.

The method can also be called for non-zygote forked processes.

(cherry picked from commit 9d157e48e0abc48f08fd98e4c5e918d029c1b84c)

Change-Id: Id4f57b77c1a7f802f80e066afcf30afecc198bfc
diff --git a/runtime/runtime.h b/runtime/runtime.h
index 386d88f..d61663c 100644
--- a/runtime/runtime.h
+++ b/runtime/runtime.h
@@ -447,7 +447,7 @@
 
   void PreZygoteFork();
   bool InitZygote();
-  void DidForkFromZygote(JNIEnv* env, NativeBridgeAction action, const char* isa);
+  void InitNonZygoteOrPostFork(JNIEnv* env, NativeBridgeAction action, const char* isa);
 
   const instrumentation::Instrumentation* GetInstrumentation() const {
     return &instrumentation_;