schbench: fix typo in strdup

Correct "stdrup" to "strdup".

Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
diff --git a/schbench.c b/schbench.c
index fdbb01c..acdb172 100644
--- a/schbench.c
+++ b/schbench.c
@@ -343,7 +343,7 @@
 		case 'J':
 			jobname = strdup(optarg);
 			if (!jobname) {
-				perror("stdrup");
+				perror("strdup");
 				exit(1);
 			}
 			break;