Add .py extension to clang-tools-extra lit cfg files

[thakis]

Summary

Follow-up to r313892, which did this for clang and llvm.

[thakis]

Actually, let me rename lit.cfg to lit.cfg.py too, one sec...

[thakis]

Ok, ptal.

clang-tools-extra/test/CMakeLists.txt

 
 string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} CLANG_TOOLS_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
 
 llvm_canonicalize_cmake_booleans(
   CLANG_ENABLE_STATIC_ANALYZER
   CLANGD_BUILD_XPC_SUPPORT)
 
 configure_lit_site_cfg(
-  ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
-  ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg
+  ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in
+  ${CMAKE_CURRENT_BINARY_DIR}/lit.site.cfg.py
+  MAIN_CONFIG
+  ${CMAKE_CURRENT_SOURCE_DIR}/lit.cfg.py
   )
 
 configure_lit_site_cfg(
-  ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
-  ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg
+  ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.py.in
+  ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg.py
+  MAIN_CONFIG
+  ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.cfg.py
   )
 
 option(CLANG_TOOLS_TEST_USE_VG "Run Clang tools' tests under Valgrind" OFF)
 if(CLANG_TOOLS_TEST_USE_VG)
   set(CLANG_TOOLS_TEST_EXTRA_ARGS ${CLANG_TEST_EXTRA_ARGS} "--vg")
 endif()
 
 set(CLANG_TOOLS_TEST_DEPS

clang-tools-extra/test/Unit/lit.site.cfg.py.in

 @LIT_SITE_CFG_IN_HEADER@
 
 config.extra_tools_obj_dir = "@CLANG_TOOLS_BINARY_DIR@/unittests"
 config.extra_tools_src_dir = "@CLANG_TOOLS_SOURCE_DIR@/unittests"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.shlibdir = "@SHLIBDIR@"
 config.target_triple = "@TARGET_TRIPLE@"
 
-lit_config.load_config(config, "@CLANG_TOOLS_SOURCE_DIR@/test/Unit/lit.cfg")
+lit_config.load_config(config, "@CLANG_TOOLS_SOURCE_DIR@/test/Unit/lit.cfg.py")

clang-tools-extra/test/lit.site.cfg.py.in

except KeyError:
     e = sys.exc_info()[1]
     key, = e.args
     lit_config.fatal("unable to find %r parameter, use '--param=%s=VALUE'" % (key,key))
 
 import lit.llvm
 lit.llvm.initialize(lit_config, config)
 
 # Let the main config do the real work.
-lit_config.load_config(config, "@CLANG_TOOLS_SOURCE_DIR@/test/lit.cfg")
+lit_config.load_config(config, "@CLANG_TOOLS_SOURCE_DIR@/test/lit.cfg.py")