First pass at VulkanViewer

gyp/most.gyp

Index: gyp/most.gyp
diff --git a/gyp/most.gyp b/gyp/most.gyp
index 9b49c474c4365d29f7d29fb7cbd1ce8516acb55d..6c7fc02caf25be29f7dd0fecd9bdd237eafb9fef 100644
--- a/gyp/most.gyp
+++ b/gyp/most.gyp
@@ -29,12 +29,14 @@
         'visualbench.gyp:visualbench',
         'fuzz.gyp:fuzz',
         'kilobench.gyp:kilobench',
+        'vulkanviewer.gyp:vulkanviewer',
       ],
       'conditions': [
         [ 'skia_gpu == 0', {
           'dependencies!': [
             'visualbench.gyp:visualbench',
             'kilobench.gyp:kilobench',
+            'vulkanviewer.gyp:vulkanviewer',
           ]
         }],
         [ 'skia_os != "android" and skia_os != "linux"', {
@@ -73,6 +75,11 @@
             'skiaserve.gyp:skiaserve',
           ],
         }],
+        [ 'skia_vulkan == 0 or skia_os != "win"', {
+          'dependencies!': [
+            'vulkanviewer.gyp:vulkanviewer',
+          ],
+        }],
         [ 'skia_skip_gui',
           {
             'dependencies!': [