fbgc: enclosure-util: correct the HDD error message (#2313)

Summary:
1. The error message of error code 66 from expander should be "HDD X fault sensed".

X-link: facebookexternal/openbmc.wiwynn#2313

Test Plan:
1. Build and test pass on Grand Canyon.

2. Check there are no unexpected error logs in BMC /var/log/messages and BMC SELs.

3. Trigger HDD fault sensed in expander console.

    (1) Use command to trigger HDD fault sensed in expander console and wait for 2 minutes.
         cmd >phyop 20 242

         PHY_OP_SUCCESS

    (2) Check error message with enclosure-util.
        [Before]
        root@bmc-oob:~# enclosure-util --error
        Error Counter: 1
        Error Code 66: HDD X fault request

        [After]
        root@bmc-oob:~# enclosure-util --error
        Error Counter: 1
        Error Code 66: HDD X fault sensed

Reviewed By: williamspatrick

fbshipit-source-id: 80ae22e27dca63f30df784bc7fd5843ecec61c49

Author: zhdaniel12

meta-facebook/meta-grandcanyon/recipes-grandcanyon/plat-utils/files/enclosure-util/enclosure.h

@@ -66,7 +66,7 @@ char *exp_error_code_description[] = {
 	"HDD33 fault request",
 	"HDD34 fault request",
 	"HDD35 fault request",
-	"HDD X fault request",
+	"HDD X fault sensed",
 	"Expander Reserved",
 	"Expander Reserved",
 	"Expander Reserved",