Revert "Revert "[Orc] Directly emit machine code for the x86 resolver block and trampolines.""

This reverts commit r251937.

The test was updated to the new API, bring the API back.

llvm-svn: 251944
diff --git a/llvm/include/llvm-c/OrcBindings.h b/llvm/include/llvm-c/OrcBindings.h
index 78a7bc1..f6aff91 100644
--- a/llvm/include/llvm-c/OrcBindings.h
+++ b/llvm/include/llvm-c/OrcBindings.h
@@ -47,8 +47,7 @@
  * client should not attempt to dispose of the Target Machine, or it will result
  * in a double-free.
  */
-LLVMOrcJITStackRef LLVMOrcCreateInstance(LLVMTargetMachineRef TM,
-                                         LLVMContextRef Context);
+LLVMOrcJITStackRef LLVMOrcCreateInstance(LLVMTargetMachineRef TM);
 
 /**
  * Mangle the given symbol.