Add some configure/CMake options for enabling/disabling Subzero targets.

include/llvm/Config/SZTargets.def.in

Index: include/llvm/Config/SZTargets.def.in
diff --git a/include/llvm/Config/Targets.def.in b/include/llvm/Config/SZTargets.def.in
similarity index 80%
copy from include/llvm/Config/Targets.def.in
copy to include/llvm/Config/SZTargets.def.in
index d589ecee12cc495404e4446967e51e8c5d1a56a0..72d7d4532f3bfe9144e1c6e5142e88817da6aa17 100644
--- a/include/llvm/Config/Targets.def.in
+++ b/include/llvm/Config/SZTargets.def.in
@@ -1,4 +1,4 @@
-/*===- llvm/Config/Targets.def - LLVM Target Architectures ------*- C++ -*-===*\
+/*===- llvm/Config/SZTargets.def - Subzero Target Architectures -*- C++ -*-===*\
 |*                                                                            *|
 |*                     The LLVM Compiler Infrastructure                       *|
 |*                                                                            *|
@@ -8,8 +8,8 @@
 |*===----------------------------------------------------------------------===*|
 |*                                                                            *|
 |* This file enumerates all of the target architectures supported by          *|
-|* this build of LLVM. Clients of this file should define the                 *|
-|* LLVM_TARGET macro to be a function-like macro with a single                *|
+|* this build of Subzero. Clients of this file should define the              *|
+|* SUBZERO_TARGET macro to be a function-like macro with a single             *|
 |* parameter (the name of the target); including this file will then          *|
 |* enumerate all of the targets.                                              *|
 |*                                                                            *|
@@ -19,10 +19,10 @@
 |*                                                                            *|
 \*===----------------------------------------------------------------------===*/
 
-#ifndef LLVM_TARGET
-#  error Please define the macro LLVM_TARGET(TargetName)
+#ifndef SUBZERO_TARGET
+#  error Please define the macro SUBZERO_TARGET(TargetName)
 #endif
 
-@LLVM_ENUM_TARGETS@
+@SUBZERO_ENUM_TARGETS@
 
-#undef LLVM_TARGET
+#undef SUBZERO_TARGET