Support building with mtl-2.3.* (GHC 9.6)

`mtl-2.3.*` no longer re-exports `Control.Monad` from its various modules,
which breaks some code in `flexdis86`. This is easily fixed by tightening up
the imports a bit.

I also bumped the `elf-edit` submodule to bring in the GHC 9.6–related changes
from GaloisInc/elf-edit#38.

src/Flexdis86/OpTable.hs

@@ -48,7 +48,8 @@ module Flexdis86.OpTable
 import qualified Control.DeepSeq as DS
 import qualified Control.Monad.Fail as MF
 import           Control.Lens
-import           Control.Monad.State
+import           Control.Monad (forM_, unless, when)
+import           Control.Monad.State (MonadState(..), execStateT, gets)
 import           Data.Bits ((.&.), (.|.), shiftR, shiftL)
 import qualified Data.ByteString as BS
 import qualified Data.ByteString.Char8 as BSC

utils/DumpInstr.hs

@@ -3,9 +3,10 @@
 
 module Main where
 
-import           Control.Monad.Except
+import           Control.Monad (when)
+import           Control.Monad.Except (MonadError(..), ExceptT, runExceptT)
 import qualified Control.Monad.Fail as Fail
-import           Control.Monad.State
+import           Control.Monad.State (MonadState(..), State, evalState)
 import qualified Data.ByteString as BS
 import           Numeric (readHex)
 import           System.Environment (getArgs)