[gn] port 5951c44

Author: nico

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

@@ -892,6 +892,7 @@ if (current_toolchain == default_toolchain) {
       "__cxx03/__utility/unreachable.h",
       "__cxx03/__variant/monostate.h",
       "__cxx03/__verbose_abort",
+      "__cxx03/__verbose_trap",
       "__cxx03/algorithm",
       "__cxx03/array",
       "__cxx03/atomic",
@@ -1601,6 +1602,7 @@ if (current_toolchain == default_toolchain) {
       "__vector/vector_bool.h",
       "__vector/vector_bool_formatter.h",
       "__verbose_abort",
+      "__verbose_trap",
       "algorithm",
       "any",
       "array",