[scudo] Fix GCC build after 212604 (#212904) Change #212604 introduced an issue when building with gcc where it complains there are "too few template-parameter-lists" (see log: https://lab.llvm.org/buildbot/#/builders/131/builds/51269/steps/6/logs/stdio ) This PR fixes the build. Assisted-by: Automated tooling, human reviewed. GitOrigin-RevId: aae5b3f2a92cc1c08a4bd65ba397fba5e37272fe