[VS Addin] Add default compiler include paths to visual studio

[VS Addin] Add default compiler include paths to visual studio

This allows intelisense to find the NaCl compiler
headers and prevents the red underline on standard
include files.

Still not perfect as it doesn't dectect use of
libc++ vs libstdc++ in PNaCl, but a huge improvement.

I ended up forking the default.props files (previously
these were derived from the x86_64 version at package
create time).

TEST= manual local testing.
BUG= https://code.google.com/p/chromium/issues/detail?id=179121
R=binji@chromium.org

Committed: https://code.google.com/p/nativeclient-sdk/source/detail?r=1578

[Sam Clegg, 2014-09-23 01:09:12]

sbc@chromium.org changed reviewers:
+ binji@chromium.org

[binji, 2014-09-23 20:30:17]

lgtm

[Sam Clegg, 2014-09-24 18:54:52]

Committed patchset #3 manually as r1578 (presubmit successful).

[nkanand, 2014-10-10 19:27:55]

On 2014/09/24 18:54:52, Sam Clegg wrote:
> Committed patchset #3 manually as r1578 (presubmit successful).

Now the builds are failing with error message:
...nacl_sdk\pepper_37\toolchain\win_x86_newlib\bin\x86_32-nacl-gcc.exe is
invalid.
Changes in pepper bundle to include the compiler and linker exe's for Nacl32 are
missing