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/trace.cc b/src/trace.cc
index a23d202..09c1d3f 100644
--- a/src/trace.cc
+++ b/src/trace.cc
@@ -25,7 +25,7 @@
 #include "mirror/abstract_method-inl.h"
 #include "mirror/dex_cache.h"
 #include "mirror/object_array-inl.h"
-#if !defined(ART_USE_LLVM_COMPILER)
+#if !defined(ART_USE_PORTABLE_COMPILER)
 #include "oat/runtime/oat_support_entrypoints.h"
 #endif
 #include "object_utils.h"