win ninja: Refactor manifest generate and embed to be 1-pass

test/win/linker-flags/unsupported-manifest.gyp

Index: test/win/linker-flags/unsupported-manifest.gyp
diff --git a/test/self-dependency/self_dependency.gyp b/test/win/linker-flags/unsupported-manifest.gyp
similarity index 58%
copy from test/self-dependency/self_dependency.gyp
copy to test/win/linker-flags/unsupported-manifest.gyp
index 0ca76c669b6a686bf686c5b9a4be5e9ebc2b2c41..5549e7cb9bd6f887a62efbefc8d700ce0292e679 100644
--- a/test/self-dependency/self_dependency.gyp
+++ b/test/win/linker-flags/unsupported-manifest.gyp
@@ -3,13 +3,11 @@
 # found in the LICENSE file.
 
 {
-  'includes': [
-    'common.gypi',
-  ],
-  'targets': [
+ 'targets': [
     {
-      'target_name': 'a',
-      'type': 'none',
+      'target_name': 'test_unsupported',
+      'type': 'executable',
+      'sources': ['manifest-in-comment.cc'],
     },
   ],
 }