tools, bpftool: Add LSM type to array of prog names

Assign "lsm" as a printed name for BPF_PROG_TYPE_LSM in bpftool, so that
it can use it when listing programs loaded on the system or when probing
features.
Signed-off-by: NQuentin Monnet <quentin@isovalent.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200724090618.16378-3-quentin@isovalent.com

tools/bpf/bpftool/prog.c

@@ -59,6 +59,7 @@ const char * const prog_type_name[] = {
 	[BPF_PROG_TYPE_TRACING]			= "tracing",
 	[BPF_PROG_TYPE_STRUCT_OPS]		= "struct_ops",
 	[BPF_PROG_TYPE_EXT]			= "ext",
+	[BPF_PROG_TYPE_LSM]			= "lsm",
 	[BPF_PROG_TYPE_SK_LOOKUP]		= "sk_lookup",
 };