vsprintf: add missing MODULE_DESCRIPTION() macro

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_printf.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/test_scanf.o

Add the missing invocations of the MODULE_DESCRIPTION() macro.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240531-md-vsprintf-v1-1-d8bc7e21539a@quicinc.comReviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>

lib/test_printf.c

@@ -824,4 +824,5 @@ static void __init selftest(void)
 
 KSTM_MODULE_LOADERS(test_printf);
 MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");
+MODULE_DESCRIPTION("Test cases for printf facility");
 MODULE_LICENSE("GPL");

lib/test_scanf.c

@@ -810,4 +810,5 @@ static void __init selftest(void)
 
 KSTM_MODULE_LOADERS(test_scanf);
 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>");
+MODULE_DESCRIPTION("Test cases for sscanf facility");
 MODULE_LICENSE("GPL v2");