TOOL-16649 CONFIG_MD is needed on the buildserver

PR URL: https://www.github.com/delphix/linux-kernel-aws/pull/22

Author: Prakash Surya

debian.aws/config/OVERRIDES

@@ -41,7 +41,6 @@ CONFIG_IPACK_BUS=n
 CONFIG_LIBNVDIMM=n
 CONFIG_MAILBOX=n
 CONFIG_MCB=n
-CONFIG_MD=n
 CONFIG_MEDIA_SUPPORT=n
 CONFIG_MEMSTICK=n
 CONFIG_MMC=n