Add TestGypXcodeNinja to run tests against the xcode-ninja generator

test/intermediate_dir/gyptest-intermediate-dir.py

Index: test/intermediate_dir/gyptest-intermediate-dir.py
diff --git a/test/intermediate_dir/gyptest-intermediate-dir.py b/test/intermediate_dir/gyptest-intermediate-dir.py
index 0e1020ef314e0abe601e41a084526dfaad6adf29..8f9c270ca3284fcbe5f485cbae6473973c5d3fed 100755
--- a/test/intermediate_dir/gyptest-intermediate-dir.py
+++ b/test/intermediate_dir/gyptest-intermediate-dir.py
@@ -12,7 +12,10 @@ import TestGyp
 
 test = TestGyp.TestGyp()
 
-test.run_gyp('test.gyp', chdir='src')
+test.run_gyp('test.gyp',
+             '-G', 'xcode_ninja_target_pattern=^target1$',
+             chdir='src')
+
 test.build('test.gyp', 'target1', chdir='src')
 # Check stuff exists.
 intermediate_file1 = test.read('src/outfile.txt')
@@ -21,7 +24,10 @@ test.must_contain(intermediate_file1, 'target1')
 shared_intermediate_file1 = test.read('src/shared_outfile.txt')
 test.must_contain(shared_intermediate_file1, 'shared_target1')
 
-test.run_gyp('test2.gyp', chdir='src')
+test.run_gyp('test2.gyp',
+             '-G', 'xcode_ninja_target_pattern=^target2$',
+             chdir='src')
+
 # Force the shared intermediate to be rebuilt.
 test.sleep()
 test.touch('src/shared_infile.txt')