Merge x86 data and header lowering

Makefile.standalone

 # The following variables will likely need to be modified, depending on where
 # and how you built LLVM & Clang. They can be overridden in a command-line
 # invocation of make, like:
 #
 #   make LLVM_SRC_PATH=<path> LIBCXX_INSTALL_PATH=<path> CLANG_PATH=<path> \
 #        PNACL_BIN_PATH=<path> ...
 #
 
 # LLVM_SRC_PATH is the path to the root of the checked out source code. This
 # directory should contain the configure script, the include/ and lib/
@@ skipping 224 matching lines @@
 # compile, in the hope of improving parallel build time.
 SRCS = \
   IceAssemblerARM32.cpp \
   IceInstARM32.cpp \
   IceInstMIPS32.cpp \
   IceInstX8632.cpp \
   IceInstX8664.cpp \
   IceTargetLowering.cpp \
   IceTargetLoweringARM32.cpp \
   IceTargetLoweringMIPS32.cpp \
+  IceTargetLoweringX86.cpp \
   IceTargetLoweringX8632.cpp \
   IceTargetLoweringX8664.cpp \
   IceAssembler.cpp \
   IceBrowserCompileServer.cpp \
   IceCfg.cpp \
   IceCfgNode.cpp \
   IceClFlags.cpp \
   IceCompiler.cpp \
   IceCompileServer.cpp \
   IceELFObjectWriter.cpp \
@@ skipping 295 matching lines @@
         @echo See Subzero size breakdown in bloat/pnacl-sz.bloat.html
 
 docs:
         make -C docs -f Makefile.standalone
 
 clean:
         rm -rf pnacl-sz *.o $(OBJDIR) $(SB_OBJDIR) build/pnacl-sz.bloat.json
 
 clean-all: clean
         rm -rf build/  crosstest/Output/