fprobe: add missing MODULE_DESCRIPTION() macro

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in samples/fprobe/fprobe_example.o

Add the missing invocation of the MODULE_DESCRIPTION() macro.

Link: https://lore.kernel.org/all/[e-mail]/

Signed-off-by: Jeff Johnson <[e-mail]>
Signed-off-by: Masami Hiramatsu (Google) <[e-mail]>

samples/fprobe/fprobe_example.c

···
 
 module_init(fprobe_init)
 module_exit(fprobe_exit)
+MODULE_DESCRIPTION("sample kernel module showing the use of fprobe");
 MODULE_LICENSE("GPL");