Fix XCObject._EncodeString() for unicode characters.

test/mac/gyptest-unicode-settings.py

Index: test/mac/gyptest-unicode-settings.py
diff --git a/test/mac/gyptest-deployment-target.py b/test/mac/gyptest-unicode-settings.py
similarity index 51%
copy from test/mac/gyptest-deployment-target.py
copy to test/mac/gyptest-unicode-settings.py
index afa6c776ef9656b42980ce376356dd2587785e82..88ac73330939a416919a0939ec4263e293ab0bc6 100644
--- a/test/mac/gyptest-deployment-target.py
+++ b/test/mac/gyptest-unicode-settings.py
@@ -5,7 +5,7 @@
 # found in the LICENSE file.
 
 """
-Verifies that MACOSX_DEPLOYMENT_TARGET works.
+Verifies that unicode strings in 'xcode_settings' work.
 """
 
 import TestGyp
@@ -13,11 +13,7 @@ import TestGyp
 import sys
 
 if sys.platform == 'darwin':
-  test = TestGyp.TestGyp(formats=['make', 'ninja', 'xcode'])
-
-  test.run_gyp('deployment-target.gyp', chdir='deployment-target')
-
-  test.build('deployment-target.gyp', test.ALL, chdir='deployment-target')
-
+  test = TestGyp.TestGyp(formats=['xcode'])
+  test.run_gyp('test.gyp', chdir='unicode-settings')
+  test.build('test.gyp', test.ALL, chdir='unicode-settings')
   test.pass_test()
-