Roll external/abseil_cpp/ c0b9bd08e..ba5fd0979 (2 commits) (#5818)

* Roll external/abseil_cpp/ c0b9bd08e..ba5fd0979 (2 commits)

abseil/abseil-cpp@c0b9bd0...ba5fd09

Created with:
  roll-dep external/abseil_cpp

* Roll external/spirv-headers/ 2a9b6f951..ec59c77a3 (2 commits)

KhronosGroup/SPIRV-Headers@2a9b6f9...ec59c77

Created with:
  roll-dep external/spirv-headers

---------

Co-authored-by: GitHub Actions[bot] <>

DEPS

@@ -3,7 +3,7 @@ use_relative_paths = True
 vars = {
   'github': 'https://github.com',
 
-  'abseil_revision': 'c0b9bd08e0ac10d06683b19193b776b8b87181d7',
+  'abseil_revision': 'ba5fd0979b4e74bd4d1b8da1d84347173bd9f17f',
 
   'effcee_revision': '2c97e5689ed8d7ab6ae5820f884f03a601ae124b',
 
@@ -14,7 +14,7 @@ vars = {
 
   're2_revision': '6dcd83d60f7944926bfd308cc13979fc53dd69ca',
 
-  'spirv_headers_revision': '2a9b6f951c7d6b04b6c21fe1bf3f475b68b84801',
+  'spirv_headers_revision': 'ec59c77a3bb5c747a369931ef101ac7c14823f2f',
 }
 
 deps = {