Remove notes about SwiftCompilerSources being unsupported with Xcode

Author: cbjeukendrup

CMakeLists.txt

@@ -192,8 +192,7 @@ set(SWIFT_TOOLS_ENABLE_LTO OFF CACHE STRING "Build Swift tools with LTO. One
     option only affects the tools that run on the host (the compiler), and has
     no effect on the target libraries (the standard library and the runtime).")
 
-# NOTE: We do not currently support building the swift compiler modules with the Xcode generator.
-cmake_dependent_option(BOOTSTRAPPING_MODE [=[
+option(BOOTSTRAPPING_MODE [=[
 How to build the swift compiler modules. Possible values are
     OFF:           build without swift modules
     HOSTTOOLS:     build with a pre-installed toolchain
@@ -204,7 +203,7 @@ How to build the swift compiler modules. Possible values are
                    `SWIFT_NATIVE_SWIFT_TOOLS_PATH` (non-Darwin only)
     CROSSCOMPILE-WITH-HOSTLIBS:    build with a bootstrapping-with-hostlibs compiled
                                    compiler, provided in `SWIFT_NATIVE_SWIFT_TOOLS_PATH`
-]=]  OFF "NOT XCODE" OFF)
+]=] OFF)
 
 # The following only works with the Ninja generator in CMake >= 3.0.
 set(SWIFT_PARALLEL_LINK_JOBS "" CACHE STRING
@@ -1110,8 +1109,6 @@ if(SWIFT_INCLUDE_TOOLS)
   # SwiftCompilerSources must come before "tools".
   # It adds swift module names to the global property "swift_compiler_modules"
   # which is used in add_swift_host_tool for the lldb workaround.
-  #
-  # NOTE: We do not currently support SwiftCompilerSources with the Xcode generator.
   add_subdirectory(SwiftCompilerSources)
 
   # Always include this after including stdlib/!