Refactor: Finish replacing CMAKE_BUILD_WITH_CMAKE with CMAKE_BOOTSTRAP

Remove -DCMAKE_BUILD_WITH_CMAKE from Source/CMakeLists.txt. Remove
CMAKE_BOOTSTRAP from bootstrap's cmConfigure.h. Add -DCMAKE_BOOTSTRAP
to all bootstrap sources, and remove the Unix specialization of
CMAKE_BOOTSTRAP in libuv (a review of the libuv code suggests that
this will not have an effect on the Windows build.)

Source/CMakeLists.txt

@@ -95,9 +95,6 @@ include_directories(
   ${CMake_HAIKU_INCLUDE_DIRS}
   )
 
-# let cmake know it is supposed to use it
-add_definitions(-DCMAKE_BUILD_WITH_CMAKE)
-
 # Check if we can build the ELF parser.
 if(CMAKE_USE_ELF_PARSER)
   set(ELF_SRCS cmELF.h cmELF.cxx)

bootstrap

@@ -1362,7 +1362,6 @@ cmake_report cmConfigure.h${_tmp} "#define CMAKE_BOOTSTRAP_BINARY_DIR \"${CMAKE_
 cmake_report cmConfigure.h${_tmp} "#define CMake_DEFAULT_RECURSION_LIMIT 400"
 cmake_report cmConfigure.h${_tmp} "#define CMAKE_BIN_DIR \"/bootstrap-not-insalled\""
 cmake_report cmConfigure.h${_tmp} "#define CMAKE_DATA_DIR \"/bootstrap-not-insalled\""
-cmake_report cmConfigure.h${_tmp} "#define CMAKE_BOOTSTRAP"
 cmake_report cmConfigure.h${_tmp} "#define CM_FALLTHROUGH"
 
 # Regenerate configured headers
@@ -1408,7 +1407,6 @@ if ${cmake_system_mingw}; then
   uv_c_flags="${uv_c_flags} -DWIN32_LEAN_AND_MEAN -D_WIN32_WINNT=0x0600"
   libs="${libs} -lws2_32 -lpsapi -liphlpapi -lshell32 -luserenv -lole32 -loleaut32"
 else
-  uv_c_flags="${uv_c_flags} -DCMAKE_BOOTSTRAP"
   case "${cmake_system}" in
     *AIX*)
       uv_c_flags="${uv_c_flags} -D_ALL_SOURCE -D_XOPEN_SOURCE=500 -D_LINUX_SOURCE_COMPAT"
@@ -1469,11 +1467,13 @@ cmake_cxx_flags_SystemTools="
   -DKWSYS_CXX_HAS_UTIMES=${KWSYS_CXX_HAS_UTIMES}
 "
 cmake_c_flags="${cmake_c_flags} \
+  -DCMAKE_BOOTSTRAP \
   -I`cmake_escape \"${cmake_bootstrap_dir}\"` \
   -I`cmake_escape \"${cmake_source_dir}/Source\"` \
   -I`cmake_escape \"${cmake_source_dir}/Source/LexerParser\"` \
   -I`cmake_escape \"${cmake_source_dir}/Utilities\"`"
 cmake_cxx_flags="${cmake_cxx_flags} \
+  -DCMAKE_BOOTSTRAP \
   -I`cmake_escape \"${cmake_bootstrap_dir}\"` \
   -I`cmake_escape \"${cmake_source_dir}/Source\"` \
   -I`cmake_escape \"${cmake_source_dir}/Source/LexerParser\"` \