bpftool: add support for CGROUP_STORAGE maps

Add BPF_MAP_TYPE_CGROUP_STORAGE maps to the list
of maps types which bpftool recognizes.

Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>

tools/bpf/bpftool/map.c

@@ -65,6 +65,7 @@ static const char * const map_type_name[] = {
 	[BPF_MAP_TYPE_SOCKMAP]		= "sockmap",
 	[BPF_MAP_TYPE_CPUMAP]		= "cpumap",
 	[BPF_MAP_TYPE_SOCKHASH]		= "sockhash",
+	[BPF_MAP_TYPE_CGROUP_STORAGE]	= "cgroup_storage",
 };
 
 static bool map_is_per_cpu(__u32 type)