Disable MCJIT on non-Darwin platforms

Currently the runtime dynamic linker lacks object file support for anything
other than Mach-O.

git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@132583 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Expression/ClangExpressionParser.cpp b/source/Expression/ClangExpressionParser.cpp
index 255013e..2c411e4 100644
--- a/source/Expression/ClangExpressionParser.cpp
+++ b/source/Expression/ClangExpressionParser.cpp
@@ -52,7 +52,10 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ExecutionEngine/ExecutionEngine.h"
 
-//#define USE_STANDARD_JIT
+#if !defined(__APPLE__)
+#define USE_STANDARD_JIT
+#endif
+
 #if defined (USE_STANDARD_JIT)
 #include "llvm/ExecutionEngine/JIT.h"
 #else