Remove Iceland.

ART_USE_LLVM_COMPILER is removed and when necessary ART_USE_PORTABLE_COMPILER
is used in #ifdefs.

Change-Id: Iffa9ce5b0246c7c427ccc4e67ecc134624632e55
diff --git a/src/native/dalvik_system_VMRuntime.cc b/src/native/dalvik_system_VMRuntime.cc
index 5ce27fb..4c6777a 100644
--- a/src/native/dalvik_system_VMRuntime.cc
+++ b/src/native/dalvik_system_VMRuntime.cc
@@ -122,7 +122,7 @@
   return env->NewStringUTF(Runtime::Current()->GetVersion());
 }
 
-#if !defined(ART_USE_LLVM_COMPILER)
+#if !defined(ART_USE_PORTABLE_COMPILER)
 static void DisableCheckJniCallback(Thread* t, void*) {
   t->GetJniEnv()->SetCheckJniEnabled(false);
 }
@@ -136,7 +136,7 @@
     Runtime* runtime = Runtime::Current();
     JavaVMExt* vm = runtime->GetJavaVM();
 
-#if !defined(ART_USE_LLVM_COMPILER)
+#if !defined(ART_USE_PORTABLE_COMPILER)
     if (vm->check_jni) {
       LOG(WARNING) << "Turning off CheckJNI so we can turn on JNI app bug workarounds...";
       Thread* self = static_cast<JNIEnvExt*>(env)->self;