lib/math: add missing MODULE_DESCRIPTION() macros

make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/math/prime_numbers.o
WARNING: modpost: missing MODULE_DESCRIPTION() in lib/math/rational-test.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-lib-math-v1-1-11a3bec51ebb@quicinc.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

lib/math/prime_numbers.c

@@ -311,4 +311,5 @@ module_exit(primes_exit);
 module_param_named(selftest, selftest_max, ulong, 0400);
 
 MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Prime number library");
 MODULE_LICENSE("GPL");

lib/math/rational-test.c

@@ -53,4 +53,5 @@ static struct kunit_suite rational_test_suite = {
 
 kunit_test_suites(&rational_test_suite);
 
+MODULE_DESCRIPTION("Rational fractions unit test");
 MODULE_LICENSE("GPL v2");