Revert "[MLIR] Remove unused config attributes from lit.site.cfg.py"

This reverts commit 0816b62.

Reason: Broke the sanitizer buildbots. More information available in the
original phabricator review: https://reviews.llvm.org/D132726

mlir/examples/standalone/test/lit.site.cfg.py.in

@@ -1,8 +1,11 @@
 @LIT_SITE_CFG_IN_HEADER@
 
 config.llvm_tools_dir = lit_config.substitute("@LLVM_TOOLS_DIR@")
+config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.mlir_obj_dir = "@MLIR_BINARY_DIR@"
+config.python_executable = "@Python3_EXECUTABLE@"
 config.enable_bindings_python = @MLIR_ENABLE_BINDINGS_PYTHON@
+config.standalone_src_root = "@CMAKE_SOURCE_DIR@"
 config.standalone_obj_root = "@CMAKE_BINARY_DIR@"
 
 import lit.llvm

mlir/test/Unit/lit.site.cfg.py.in

@@ -2,9 +2,15 @@
 
 import sys
 
+config.llvm_src_root = "@LLVM_SOURCE_DIR@"
+config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = lit_config.substitute("@LLVM_TOOLS_DIR@")
 config.llvm_build_mode = lit_config.substitute("@LLVM_BUILD_MODE@")
+config.enable_shared = @ENABLE_SHARED@
+config.shlibdir = lit_config.substitute("@SHLIBDIR@")
+config.mlir_src_root = "@MLIR_SOURCE_DIR@"
 config.mlir_obj_root = "@MLIR_BINARY_DIR@"
+config.mlir_tools_dir = "@MLIR_TOOLS_DIR@"
 
 # Let the main config do the real work.
 lit_config.load_config(config, "@MLIR_SOURCE_DIR@/test/Unit/lit.cfg.py")

mlir/test/lit.site.cfg.py.in

@@ -2,18 +2,35 @@
 
 import sys
 
+config.host_triple = "@LLVM_HOST_TRIPLE@"
+config.target_triple = "@LLVM_TARGET_TRIPLE@"
+config.llvm_src_root = "@LLVM_SOURCE_DIR@"
+config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = lit_config.substitute("@LLVM_TOOLS_DIR@")
+config.llvm_lib_dir = lit_config.substitute("@LLVM_LIBS_DIR@")
+config.llvm_shlib_dir = lit_config.substitute("@SHLIBDIR@")
 config.llvm_shlib_ext = "@SHLIBEXT@"
+config.llvm_exe_ext = "@EXEEXT@"
+config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.python_executable = "@Python3_EXECUTABLE@"
+config.gold_executable = "@GOLD_EXECUTABLE@"
+config.ld64_executable = "@LD64_EXECUTABLE@"
+config.enable_shared = @ENABLE_SHARED@
 config.enable_assertions = @ENABLE_ASSERTIONS@
+config.targets_to_build = "@TARGETS_TO_BUILD@"
 config.native_target = "@LLVM_NATIVE_ARCH@"
+config.llvm_bindings = "@LLVM_BINDINGS@".split(' ')
 config.host_os = "@HOST_OS@"
 config.host_cc = "@HOST_CC@"
 config.host_cxx = "@HOST_CXX@"
 config.enable_libcxx = "@LLVM_ENABLE_LIBCXX@"
 config.host_cmake = "@CMAKE_COMMAND@"
 config.host_cmake_generator = "@CMAKE_GENERATOR@"
+# Note: ldflags can contain double-quoted paths, so must use single quotes here.
+config.host_ldflags = '@HOST_LDFLAGS@'
 config.llvm_use_linker = "@LLVM_USE_LINKER@"
+config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
+config.llvm_host_triple = '@LLVM_HOST_TRIPLE@'
 config.host_arch = "@HOST_ARCH@"
 config.mlir_src_root = "@MLIR_SOURCE_DIR@"
 config.mlir_obj_root = "@MLIR_BINARY_DIR@"