Remove the dsoc x86 passes

lib/DFG2LLVM_X86_dsoc/CMakeLists.txt

-if(WIN32 OR CYGWIN)
-  set(LLVM_LINK_COMPONENTS Core Support)
-endif()
-
-add_llvm_loadable_module( DFG2LLVM_X86_dsoc 
-  DFG2LLVM_X86_dsoc.cpp
-
-  DEPENDS
-  intrinsics_gen
-  PLUGIN_TOOL
-  opt
-  )
-

lib/DFG2LLVM_X86_dsoc/LLVMBuild.txt

-;===- ./lib/Transforms/DFG2LLVM_NVPTX/LLVMBuild.txt ------------*- Conf -*--===;
-;
-;                     The LLVM Compiler Infrastructure
-;
-; This file is distributed under the University of Illinois Open Source
-; License. See LICENSE.TXT for details.
-;
-;===------------------------------------------------------------------------===;
-;
-; This is an LLVMBuild description file for the components in this subdirectory.
-;
-; For more information on the LLVMBuild system, please see:
-;
-;   http://llvm.org/docs/LLVMBuild.html
-;
-;===------------------------------------------------------------------------===;
-
-[component_0]
-type = Library
-name = DFG2LLVM_X86_dsoc
-parent = Transforms
-