Roll src/third_party/nasm/ 21eb59531..4fa54ca5f (4 commits)

https://chromium.googlesource.com/chromium/deps/nasm.git/+log/21eb59531974..4fa54ca5f7fc

$ git log 21eb59531..4fa54ca5f --date=short --no-merges --format='%ad %ae %s'
2020-04-14 dalecurtis Disable sanitizers everywhere except msan.
2020-04-13 dalecurtis Disable sanitizers for nasm in all build types.
2020-04-13 dalecurtis Disable sanitizers for nasm like we do for yasm.
2019-10-07 efoo Add "# COMPONENT" to nasm OWNERS file

Created with:
  roll-dep src/third_party/nasm

TBR=davidben

Bug: 766721
Change-Id: I86327ca55472650591f52b901ecb8a508cad30a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2148027Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#759037}

DEPS

@@ -1185,7 +1185,7 @@ deps = {
 
   'src/third_party/nasm': {
       'url': Var('chromium_git') + '/chromium/deps/nasm.git' + '@' +
-      '21eb595319746a669a742d210eaa413c728e7fad'
+      '4fa54ca5f7fc3a15a8c78ac94688e64d3e4e4fa1'
   },
 
   'src/third_party/netty-tcnative/src': {