Revert "Stop checking for duplicate basenames"

test/errors/duplicate_basenames.gyp

Index: test/errors/duplicate_basenames.gyp
diff --git a/test/dependencies/lib_only.gyp b/test/errors/duplicate_basenames.gyp
old mode 100755
new mode 100644
similarity index 66%
copy from test/dependencies/lib_only.gyp
copy to test/errors/duplicate_basenames.gyp
index f6c84dea64ffb899b8a11de1d5154aec66f695f0..b3dceb3949b2b22f6c168a2314f5f84c06a905da
--- a/test/dependencies/lib_only.gyp
+++ b/test/errors/duplicate_basenames.gyp
@@ -5,12 +5,9 @@
 {
   'targets': [
     {
-      'target_name': 'a',
+      'target_name': 'foo',
       'type': 'static_library',
-      'sources': [
-        'a.c',
-      ],
-      'dependencies': ['b/b.gyp:b'],
+      'sources': ['foo.c', 'foo.cc'],
     },
-  ],
+  ]
 }