bees: don't try to print si_lower and si_upper

Some build environments (ARM?  AARCH64?) do not have the fields
si_lower and si_upper in siginfo.

bees doesn't need them, so don't try to access them.

Signed-off-by: Zygo Blaxell <bees@furryterror.org>

src/bees.cc

@@ -686,8 +686,8 @@ operator<<(ostream &os, const siginfo_t &si)
 		<< "band = " << si.si_band << ", "
 		<< "fd = " << si.si_fd << ", "
 		<< "addr_lsb = " << si.si_addr_lsb << ", "
-		<< "lower = " << si.si_lower << ", "
-		<< "upper = " << si.si_upper << ", "
+		// << "lower = " << si.si_lower << ", "
+		// << "upper = " << si.si_upper << ", "
 		// << "pkey = " << si.si_pkey << ", "
 		<< "call_addr = " << si.si_call_addr << ", "
 		<< "syscall = " << si.si_syscall << ", "