Invoke MSBuild specifying the target platform as generated by Gyp.

Reviewed-By: James M Snell <jasnell@gmail.com>
PR-URL: #5627

backport fix for test-http-get-pipeline-problem.js from master
to 0.12.X.  We've been seeing an intermittent failure
in runs for zLinux with SLES 12.  We confirmed that this fix
resolves the issue so would like it in 0.12.X

The original commit does not apply cleanly as the paths were
changed, but the actual change is identical.  The original commit was:

3ba4f71

PR-URL: #3013
Reviewed-By: Rod Vagg <rod@vagg.org>
Reviewed-By: James M Snell <jasnell@gmail.com>

openssl-1.0.1s disables EXPORT and LOW ciphers by default.
They are obsoleted ciphers and not safe for the current use.
Node LTS also deprecates them.

Fixes: nodejs/Release#85
PR-URL: #5712
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

DES-CBC-SHA is LOW cipher and disabled by default and it is used in
tests of hornorcipherorder. They are changed as to

- use RC4-SHA instead of DES-CBC-SHA.
- add ECDHE-RSA-AES256-SHA to entries to keep the number of ciphers.
- remove tests for non-default cipher because only SEED and IDEA are
available in !RC4:!HIGH:ALL.

Fixes: nodejs/Release#85
PR-URL: #5712
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

PR-URL: #5621
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Alexis Campailla <orangemocha@nodejs.org>

Notable changes:

* npm: Upgrade to v2.15.1. (Forrest L Norvell)
* openssl: OpenSSL v1.0.1s disables the EXPORT and LOW ciphers as they
  are obsolete and not considered safe. This release of Node.js turns
  on `OPENSSL_NO_WEAK_SSL_CIPHERS` to fully disable the 27 ciphers
  included in these lists which can be used in SSLv3 and higher. Full
  details can be found in our LTS discussion on the matter
  (nodejs/Release#85).
  (Shigeki Ohtsu) #5712