First crack at adding a GYP_GENERATOR for determining various things

test/analyzer/subdir/subdir.gyp

Index: test/analyzer/subdir/subdir.gyp
diff --git a/test/android/hello.gyp b/test/analyzer/subdir/subdir.gyp
similarity index 53%
copy from test/android/hello.gyp
copy to test/analyzer/subdir/subdir.gyp
index da58a2b707f8f15d4402ff4889fef052800c55f4..cd0f0134e54337d3355f69e97abf7301a3b35d02 100644
--- a/test/android/hello.gyp
+++ b/test/analyzer/subdir/subdir.gyp
@@ -3,12 +3,16 @@
 # found in the LICENSE file.
 
 {
+  'variables': {
+    'trailing_dir_path': '../',
+   },
   'targets': [
     {
-      'target_name': 'hello',
-      'type': 'executable',
+      'target_name': 'foo',
+      'type': 'static_library',
       'sources': [
-        'hello.c',
+        'subdir_source.c',
+        '<(trailing_dir_path)/parent_source.c',
       ],
     },
   ],