Bug 1790818 - Update dump_syms to b4b85e7187bbcdd0850417498ce03e2da356b170. r=gsvelto

Differential Revision: https://phabricator.services.mozilla.com/D157336

taskcluster/ci/fetch/toolchains.yml

@@ -406,7 +406,7 @@ dump-syms:
     fetch:
         type: git
         repo: https://github.com/mozilla/dump_syms/
-        revision: 516b66603c390b3a361c508adc0140a6840ce22b
+        revision: b4b85e7187bbcdd0850417498ce03e2da356b170
 
 rust-minidump:
     description: rust-minidump 0.14.0 source code (for minidump-stackwalk)