Revert "Move clang feature flags settings out of LLVM core and into cfe"

This broke one of the builds, presumably side-by-side modular CMake.
Investigating.

This reverts commit r212998.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213005 91177308-0d34-0410-b5e6-96231b3b80d8

cmake/modules/AddLLVM.cmake

@@ -632,6 +632,22 @@ function(configure_lit_site_cfg input output)
   set(HOST_OS ${CMAKE_SYSTEM_NAME})
   set(HOST_ARCH ${CMAKE_SYSTEM_PROCESSOR})
 
+  if (CLANG_ENABLE_ARCMT)
+    set(ENABLE_CLANG_ARCMT "1")
+  else()
+    set(ENABLE_CLANG_ARCMT "0")
+  endif()
+  if (CLANG_ENABLE_REWRITER)
+    set(ENABLE_CLANG_REWRITER "1")
+  else()
+    set(ENABLE_CLANG_REWRITER "0")
+  endif()
+  if (CLANG_ENABLE_STATIC_ANALYZER)
+    set(ENABLE_CLANG_STATIC_ANALYZER "1")
+  else()
+    set(ENABLE_CLANG_STATIC_ANALYZER "0")
+  endif()
+
   configure_file(${input} ${output} @ONLY)
 endfunction()