Skip include\ucrt on VS 2013 packages

In change crrev.com/1504983002 the include\ucrt path from
the Windows 10 SDK was added to the include search path,
but this is not a legal thing to do on VS 2013. This change
makes the ucrt path VS 2015 specific.

Testing shows that this makes no difference to the VS 2015
package.

BUG=440500

Review URL: https://codereview.chromium.org/1609933004

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@298330 0039d316-1c4b-4281-b951-d872f2087c98

win_toolchain/package_from_installed.py

@@ -187,12 +187,14 @@ def GenerateSetEnvCmd(target_dir):
             'set VCINSTALLDIR=%~dp0..\\..\\VC\\\n'
             'set PATH=%~dp0..\\..\\Common7\\IDE;%PATH%\n'
             'set INCLUDE=%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\um;'
-               '%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\shared;'
-               '%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\winrt;'
-               '%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\ucrt;' # VS 2015
-               '%~dp0..\\..\\VC\\include;'
-               '%~dp0..\\..\\VC\\atlmfc\\include\n'
-            'if "%1"=="/x64" goto x64\n'.replace('WINVERSION', WIN_VERSION))
+            '%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\shared;'
+            '%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\winrt;'.replace(
+                'WINVERSION', WIN_VERSION))
+    if VS_VERSION == '2015':
+      f.write('%~dp0..\\..\\win_sdk\\Include\\WINVERSION\\ucrt;'.replace(
+                  'WINVERSION', WIN_VERSION))
+    f.write('%~dp0..\\..\\VC\\include;'
+            '%~dp0..\\..\\VC\\atlmfc\\include\n')
 
     # x86. Always use amd64_x86 cross, not x86 on x86.
     f.write('set PATH=%~dp0..\\..\\win_sdk\\bin\\x86;'