Simplify and optimize FindCycles

test/errors/file_cycle0.gyp

Index: test/errors/file_cycle0.gyp
diff --git a/test/variables/commands/repeated_multidir/main.gyp b/test/errors/file_cycle0.gyp
similarity index 59%
copy from test/variables/commands/repeated_multidir/main.gyp
copy to test/errors/file_cycle0.gyp
index 5beeeb7244d2e9f95f01c35d506d62b4afa5ad09..3bfafb6cb393781e848ce737545c6e3cf9fccde3 100644
--- a/test/variables/commands/repeated_multidir/main.gyp
+++ b/test/errors/file_cycle0.gyp
@@ -5,12 +5,13 @@
 {
   'targets': [
     {
-      'target_name': 'main',
+      'target_name': 'top',
+      'type': 'none',
+      'dependencies': [ 'file_cycle1.gyp:middle' ],
+    },
+    {
+      'target_name': 'bottom',
       'type': 'none',
-      'dependencies': [
-        'dir_1/test_1.gyp:target_1',
-        'dir_2/test_2.gyp:target_2',
-      ],
     },
   ],
 }