Libraries without '-l' treated as relative paths.

The following have the same effect on Windows:
'msvs_settings': { 'VCLinkerTool': { 'AdditionalDependencies': [ 'windowscodecs.lib', ],},},
'link_settings': {'libraries': ['-lwindowscodecs.lib',],},

But this one is different:
'link_settings': {'libraries': ['windowscodecs.lib',],},

since this last one will attempt to find the library at
third_party\skia\gyp\windowscodecs.lib
or a place like this, instead of looking in the library paths.

This also fixes capitalization of the affected libraries.

R=bsalomon@google.com

Review URL: https://codereview.chromium.org/99463002

git-svn-id: http://skia.googlecode.com/svn/trunk@12434 2bbb7eff-a529-9590-31e7-b0007b416f81

gyp/images.gyp

@@ -84,7 +84,7 @@
           ],
           'link_settings': {
             'libraries': [
-              'windowscodecs.lib',
+              '-lwindowscodecs.lib',
             ],
           },
         },{ #else if skia_os != win

gyp/xps.gyp

@@ -25,8 +25,8 @@
         [ 'skia_os == "win"', {
           'link_settings': {
             'libraries': [
-              'T2Embed.lib',
-              'FontSub.lib',
+              '-lt2embed.lib',
+              '-lfontsub.lib',
             ],
           },
         },{ #else if 'skia_os != "win"'