Fix return value printing for shmat (Lauro Ramos Venancio).

The shmat syscall returns an address, so we must use the
print_syscall_ret_addr function.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5565 c046a42c-6fe2-441c-8c8c-71466251a162

linux-user/strace.list

@@ -1250,7 +1250,7 @@
 { TARGET_NR_sgetmask, "sgetmask" , NULL, NULL, NULL },
 #endif
 #ifdef TARGET_NR_shmat
-{ TARGET_NR_shmat, "shmat" , NULL, NULL, NULL },
+{ TARGET_NR_shmat, "shmat" , NULL, NULL, print_syscall_ret_addr },
 #endif
 #ifdef TARGET_NR_shmctl
 { TARGET_NR_shmctl, "shmctl" , NULL, NULL, NULL },