Added update_repositories command line argument to refresh git repositories. And added recipe for Criterion.

SConscript

@@ -140,12 +140,19 @@ AddOption(
     default = 'auto'
 )
 
+AddOption(
+    '--update_repositories',
+    dest = 'update_repositories',
+    action = 'store_true'
+)
+
 build_type      = GetOption('build_type')
 unity_mode      = GetOption('unity_mode')
 variant         = GetOption('variant')
 enable_asan     = GetOption('enable_asan')
 config_file     = GetOption('config_file')
 compiler        = GetOption('compiler')
+update_repositories = GetOption('update_repositories')
 
 default_CC = {
     'gcc': 'gcc',
@@ -170,6 +177,7 @@ env = Environment(tools = ['default', 'compilation_db', 'unity_build'], variable
 env['RECIPES_FOLDERS'] = [Dir('recipes')]
 env['SYSTEM_CACHE_DIR'] = os.path.join(_find_system_cache_dir(), 'spp_cache')
 env['CLONE_DIR'] = os.path.join(env['SYSTEM_CACHE_DIR'], 'cloned')
+env['UPDATE_REPOSITORIES'] = update_repositories
 
 print(f'Detected system cache directory: {env["SYSTEM_CACHE_DIR"]}')
 try: