Another attempt to fix "could not find clang-check" lit warning in analyzer-less builds

[thakis]

Summary

r359717 added clang-check as a dep of check-clang unconditionally because I had missed lit.local.cfg in test/Tooling.

Instead, only add clang-check to the tools if the analyzer is enabled, since the build target only exists then, and since all tests using clang-check are skipped when the analyzer is disabled.

[rnk]

lgtm

clang/test/lit.cfg.py

 
 # For each occurrence of a clang tool name, replace it with the full path to
 # the build directory holding that tool.  We explicitly specify the directories
 # to search to ensure that we get the tools just built and not some random
 # tools that might happen to be in the user's PATH.
 tool_dirs = [config.clang_tools_dir, config.llvm_tools_dir]
 
 tools = [
-    'c-index-test', 'clang-check', 'clang-diff', 'clang-format', 'clang-tblgen',
-    'opt',
+    'c-index-test', 'clang-diff', 'clang-format', 'clang-tblgen', 'opt',
     ToolSubst('%clang_extdef_map', command=FindTool(
         'clang-extdef-mapping'), unresolved='ignore'),
 ]
 
 if config.clang_examples:
     config.available_features.add('examples')
     tools.append('clang-interpreter')
 
+if config.clang_staticanalyzer:
+    config.available_features.add('staticanalyzer')
+    tools.append('clang-check')
+
+    if config.clang_staticanalyzer_z3 == '1':
+        config.available_features.add('z3')
+
+
 llvm_config.add_tool_substitutions(tools, tool_dirs)
 
 config.substitutions.append(
     ('%hmaptool', "'%s' %s" % (config.python_executable,
                              os.path.join(config.clang_tools_dir, 'hmaptool'))))
 
 # Plugins (loadable modules)
 # TODO: This should be supplied by Makefile or autoconf.
 if sys.platform in ['win32', 'cygwin']:
     has_plugins = config.enable_shared
 else:
     has_plugins = True
 
 if has_plugins and config.llvm_plugin_ext:
     config.available_features.add('plugins')
 
 # Set available features we allow tests to conditionalize on.
 #
 if config.clang_default_cxx_stdlib != '':
     config.available_features.add('default-cxx-stdlib-set')
 
-# Enabled/disabled features
-if config.clang_staticanalyzer:
-    config.available_features.add('staticanalyzer')
-
-    if config.clang_staticanalyzer_z3 == '1':
-        config.available_features.add('z3')
-
 # As of 2011.08, crash-recovery tests still do not pass on FreeBSD.
 if platform.system() not in ['FreeBSD']:
     config.available_features.add('crash-recovery')
 
 # ANSI escape sequences in non-dumb terminal
 if platform.system() not in ['Windows']:
     config.available_features.add('ansi-escape-sequences')