Using proper GYP references for Strmiids.lib on Windows

This makes it possible to link properly using Ninja on Windows.

Another issue exists due to the path containing spaces in webrtc/modules/video_capture/windows/direct_show_base_classes.gyp but that can be worked around by copying the baseclasses dir from the SDK into a path without spaces and then overriding the direct_show_dir variable with GYP_DEFINES.

Example:

set GYP_DEFINES=direct_show_dir=C:/WinSDKv7.1_directshow_baseclasses/
gclient runhooks
ninja -C out/Debug

Notice that the ending slash is needed for the direct_show_dir variable.

BUG=none
TEST=local compilation with the baseclasses copied from Windows SDK 7.1 into C:/WinSDKv7.1_directshow_baseclasses.

Review URL: https://webrtc-codereview.appspot.com/936014

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3043 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/video_capture/video_capture.gypi

@@ -97,10 +97,10 @@
                 'windows/device_info_windows.cc',
                 'windows/video_capture_factory_windows.cc',
               ],
-              'msvs_settings': {
-                'VCLibrarianTool': {
-                  'AdditionalDependencies': 'Strmiids.lib',
-                },
+              'link_settings': {
+                'libraries': [
+                  '-lStrmiids.lib',
+                ],
               },
             }],  # win
             ['OS=="android"', {