bug 14918 part1: consistency/cleanup ideas (from jbolz/pdaniell/dkoch) (WIP)

Change alignment types and replace byRegion by VkDependencyFlags.

https://cvs.khronos.org/bugzilla/show_bug.cgi?id=14918
diff --git a/vulkan.py b/vulkan.py
index 84f4b5a..1790160 100755
--- a/vulkan.py
+++ b/vulkan.py
@@ -947,7 +947,7 @@
             [Param("VkCmdBuffer", "cmdBuffer"),
              Param("VkPipelineStageFlags", "srcStageMask"),
              Param("VkPipelineStageFlags", "destStageMask"),
-             Param("VkBool32", "byRegion"),
+             Param("VkDependencyFlags", "dependencyFlags"),
              Param("uint32_t", "memBarrierCount"),
              Param("const void* const*", "ppMemBarriers")]),