Update libprotobuf-mutator to b2c4fb59135711122b800376d8dc46af2fc9d060

DEPS

 # This file is used to manage the dependencies of the Chromium src repo. It is
 # used by gclient to determine what version of each dependency to check out, and
 # where.
 #
 # For more information, please refer to the official documentation:
 #   https://sites.google.com/a/chromium.org/dev/developers/how-tos/get-the-code
 #
 # When adding a new dependency, please update the top-level .gitignore file
 # to list the dependency's destination directory.
 #
@@ skipping 90 matching lines @@
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.
   'libfuzzer_revision': 'a746f0ef810637b40784e808bad49aa2ef1bde8b',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling devtools-node-modules
   # and whatever else without interference from each other.
   'devtools_node_modules_revision': '6226d6cd80aaf2e5295ed460cf73ef6a582e4d78',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libprotobuf-mutator
   # and whatever else without interference from each other.
-  'libprotobuf-mutator': '2d609dfa69f670f6a1daf80eaa2d538f96120b2d',
+  'libprotobuf-mutator': 'b2c4fb59135711122b800376d8dc46af2fc9d060',
 }
 
 # Only these hosts are allowed for dependencies in this DEPS file.
 # If you need to add a new host, contact chrome infrastracture team.
 allowed_hosts = [
   'android.googlesource.com',
   'boringssl.googlesource.com',
   'chromium.googlesource.com',
   'pdfium.googlesource.com',
   'skia.googlesource.com',
@@ skipping 1027 matching lines @@
 recursedeps = [
   # buildtools provides clang_format, libc++, and libc++abi
   'src/buildtools',
   # android_tools manages the NDK.
   'src/third_party/android_tools',
   # ANGLE manages DEPS that it also owns the build files for, such as dEQP.
   ("src/third_party/angle", "DEPS.chromium"),
   # SwiftShader manages DEPS that it also owns the build files for, such as Subzero.
   ("src/third_party/swiftshader", "DEPS"),
 ]