[gn build] Port 61f1f13

Author: aeubanks

llvm/utils/gn/secondary/libcxx/include/BUILD.gn

@@ -415,6 +415,7 @@ if (current_toolchain == default_toolchain) {
       "__coroutine/noop_coroutine_handle.h",
       "__coroutine/trivial_awaitables.h",
       "__debug_utils/randomize_range.h",
+      "__debug_utils/sanitizers.h",
       "__debug_utils/strict_weak_ordering_check.h",
       "__exception/exception.h",
       "__exception/exception_ptr.h",