Workaround for x86 build now.

Author: Logan Chien.

Change-Id: I79fe237ad301ac9f79185c87058ff7b6437f0758
diff --git a/src/compiler_llvm/compilation_unit.cc b/src/compiler_llvm/compilation_unit.cc
index fdbf575..8aae161 100644
--- a/src/compiler_llvm/compilation_unit.cc
+++ b/src/compiler_llvm/compilation_unit.cc
@@ -363,6 +363,14 @@
 
 
 bool CompilationUnit::ExtractCodeAndPrelink(const std::string& elf_image) {
+  if (GetInstructionSet() == kX86) {
+    compiled_code_.push_back(0xccU);
+    compiled_code_.push_back(0xccU);
+    compiled_code_.push_back(0xccU);
+    compiled_code_.push_back(0xccU);
+    return true;
+  }
+
   llvm::OwningPtr<llvm::MemoryBuffer> elf_image_buff(
     llvm::MemoryBuffer::getMemBuffer(llvm::StringRef(elf_image.data(),
                                                      elf_image.size())));