kconfig/conf: print the seed used to initialise the RNG for randconfig

... so the user has a chance to reproduce a test-case.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 94521c7..38616c1 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -532,6 +532,7 @@
 					seed = tmp;
 				}
 			}
+			fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
 			srand(seed);
 			break;
 		}