libbpf: Fix glob_syms memory leak in bpf_linker

[ Upstream commit 8cb125566c ]

glob_syms array wasn't freed on bpf_link__free(). Fix that.

Fixes: a46349227c ("libbpf: Add linker extern resolution support for functions and global variables")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211124002325.1737739-6-andrii@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

tools/lib/bpf/linker.c

@@ -211,6 +211,7 @@ void bpf_linker__free(struct bpf_linker *linker)
 	}
 	free(linker->secs);
 
+	free(linker->glob_syms);
 	free(linker);
 }