[lit] Deduplicate logic in toolchain.py

No need to compute the path of lit-lldb-init twice.

llvm-svn: 364113

Author: JDevlieghere

lldb/lit/helper/toolchain.py

@@ -34,17 +34,15 @@ def use_lldb_substitutions(config):
     if config.llvm_libs_dir:
         build_script_args.append('--libs-dir={0}'.format(config.llvm_libs_dir))
 
+    lldb_init = os.path.join(config.test_exec_root, 'lit-lldb-init')
+
     primary_tools = [
         ToolSubst('%lldb',
                   command=FindTool('lldb'),
-                  extra_args=['--no-lldbinit', '-S',
-                              os.path.join(config.test_exec_root,
-                                           'lit-lldb-init')]),
+                  extra_args=['--no-lldbinit', '-S', lldb_init]),
         ToolSubst('%lldb-init',
                   command=FindTool('lldb'),
-                  extra_args=['-S',
-                              os.path.join(config.test_exec_root,
-                                           'lit-lldb-init')]),
+                  extra_args=['-S', lldb_init]),
         lldbmi,
         ToolSubst('%debugserver',
                   command=FindTool(dsname),