Clarify output message to look less scary

docs/firmware_download.txt

@@ -7,7 +7,7 @@ latest versions.
 These pages provide the the description, checksum and binaries for the
 bootable BIOS update CD images for both the current and historical releases.
 
-e220    https://support.lenovo.com/hk/en/downloads/DS031908
+e330    https://support.lenovo.com/hk/en/downloads/DS031908
 l430    https://support.lenovo.com/hk/en/downloads/DS018887
 p51     https://support.lenovo.com/hk/en/downloads/DS121297
 t430    https://pcsupport.lenovo.com/gb/en/downloads/DS029252

scripts/fix_mbr

@@ -221,7 +221,7 @@ sub fixup_boot {
 
     if (ord(substr($buf,0,1)) == 0) {
         # No normal x86 boot instruction starts with a zero.
-        warn("Found corrupted bootcode in ISO from Lenovo - attempting fix\n");
+        warn("INFO: Original Lenovo ISO contains a zero in MBR bootcode - attempting fix\n");
         substr($buf,0,1) = chr(0xfa);
     }