Bug 1867202 - Fix missing include in clang 8. r=firefox-build-system-reviewers,ahochheiden

Differential Revision: https://phabricator.services.mozilla.com/D194952

build/build-clang/clang-8-missing-header.patch

@@ -0,0 +1,12 @@
+diff --git a/llvm/utils/benchmark/src/benchmark_register.h b/llvm/utils/benchmark/src/benchmark_register.h
+index 0705e219f2fa..4caa5ad4da07 100644
+--- a/llvm/utils/benchmark/src/benchmark_register.h
++++ b/llvm/utils/benchmark/src/benchmark_register.h
+@@ -1,6 +1,7 @@
+ #ifndef BENCHMARK_REGISTER_H
+ #define BENCHMARK_REGISTER_H
+ 
++#include <limits>
+ #include <vector>
+ 
+ #include "check.h"

build/build-clang/clang-8.0.json

@@ -4,6 +4,7 @@
     "as": "/usr/bin/gcc",
     "targets": "X86;WebAssembly",
     "patches": [
+        "clang-8-missing-header.patch",
         "llvmorg-10-init-136-gb288d90b39f4.patch"
     ]
 }