Roll src/third_party/vulkan_memory_allocator/ 431d6e572..6c656df63 (4 commits)

https://chromium.googlesource.com/external/github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator.git/+log/431d6e57284a..6c656df63da5

$ git log 431d6e572..6c656df63 --date=short --no-merges --format='%ad %ae %s'
2020-06-25 thakis mac: Only call system aligned_alloc() with the 11.0+ SDK.
2020-06-25 thakis Only use system aligned_alloc on mac/ios if the SDK has them.
2020-06-25 thakis Fix argument order for aligned_alloc on mac.
2020-06-25 thakis Make vulkan_memory_allocator build with the MacOSX11.0 SDK.

Created with:
  roll-dep src/third_party/vulkan_memory_allocator

TBR=jmadill

Bug: chromium:1098741
Change-Id: I0553a043471e4a45603b9e1fd7fbd9302382e902
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2268639Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Auto-Submit: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#782804}

DEPS

@@ -1418,7 +1418,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/sctplab/usrsctp' + '@' + 'a8c51df76caae94254b1e59999405f739467490e',
 
   'src/third_party/vulkan_memory_allocator':
-    Var('chromium_git') + '/external/github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator.git' + '@' + '431d6e57284aeb08118ff428dfbd51c94342faa1',
+    Var('chromium_git') + '/external/github.com/GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator.git' + '@' + '6c656df63da5995a932aafd45b32af1974e497d9',
 
   # Display server protocol for Linux.
   'src/third_party/wayland/src': {