Roll src/third_party/libunwindstack/ dfd3f3d84..046920fc4 (2 commits)

https://chromium.googlesource.com/chromium/src/third_party/libunwindstack.git/+log/dfd3f3d84cfc..046920fc491a

$ git log dfd3f3d84..046920fc4 --date=short --no-merges --format='%ad %ae %s'
2020-05-26 wittman [Sampling profiler] Fix AsmRegs build logic for cross-compilation
2020-05-19 wittman [Sampling profiler] Include AsmGetRegs asm functions on x86/x64

Created with:
  roll-dep src/third_party/libunwindstack
R=etiennep@chromium.org

Bug: 1004855
Change-Id: I8cae2e24f9a6de1e9d4945c352a01dec8d722874
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2216327
Auto-Submit: Mike Wittman <wittman@chromium.org>
Commit-Queue: Etienne Pierre-Doray <etiennep@chromium.org>
Reviewed-by: Etienne Pierre-Doray <etiennep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772300}

DEPS

@@ -1115,7 +1115,7 @@ deps = {
   },
 
   'src/third_party/libunwindstack': {
-      'url': Var('chromium_git') + '/chromium/src/third_party/libunwindstack.git' + '@' + 'dfd3f3d84cfc222af93bc86b276414fc690977da',
+      'url': Var('chromium_git') + '/chromium/src/third_party/libunwindstack.git' + '@' + '046920fc491aba67c6f6a750b4be7b835cff4e5b',
       'condition': 'checkout_android',
   },