Update pepper versions that the addin is tested against

R=binji@chromium.org

Review URL: https://codereview.chromium.org/278653004

git-svn-id: https://nativeclient-sdk.googlecode.com/svn/trunk/src@1571 050acbb0-2703-11df-ab0a-9f3f633ae91d
[VS Addin] Add more information when compile tests fail.

These tests can fail when the build verbosity in VS is set
too low (which was happening on the bots).  This change
doesn't fix it but at least gives more information about
what might be going wrong.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/286943002

git-svn-id: https://nativeclient-sdk.googlecode.com/svn/trunk/src@1572 050acbb0-2703-11df-ab0a-9f3f633ae91d
[VS Addin] Fix several issues with install script.

Fix the --vsuser-path flag.  It was attempted to append
to a tuble.

Don't depend on any one of the vsuser-paths existing, only
that at least one of them exists.  This allows installation
to succeed on platforms that only have one version of VS
installed.

R=binji@chromium.org

Review URL: https://codereview.chromium.org/282153003

git-svn-id: https://nativeclient-sdk.googlecode.com/svn/trunk/src@1573 050acbb0-2703-11df-ab0a-9f3f633ae91d