VS 2015 package with VSINSTALLDIR and VCINSTALLDIR

This is a rebuild of the VS 2015 package that incorporates
the changes made in crrev.com/1604423002

BUG=82385

Review URL: https://codereview.chromium.org/1608373002

Cr-Original-Commit-Position: refs/heads/master@{#370586}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 9b7851a6d4410fa5aecb3a8c13cae8c709f9d2ee

vs_toolchain.py

@@ -272,7 +272,7 @@ def _GetDesiredVsToolchainHashes():
   to build with."""
   if GetVisualStudioVersion() == '2015':
     # Update 1 with Debuggers, UCRT installers and ucrtbased.dll
-    return ['524956ec6e64e68fead3773e3ce318537657b404']
+    return ['5a85cf1ce842f7cc96b9d17039a445a9dc9cf0dd']
   else:
     # Default to VS2013.
     return ['9ff97c632ae1fee0c98bcd53e71770eb3a0d8deb']