Fix stand-alone delegate build
Fix stand-alone delegate build

 * adds missing dependencies to fix errors when building the
   armnn delegate on its own

Signed-off-by: Jan Eilers <f1effb43f7b7dacf8209aaa37935f1cffdf56e41@arm.com>
Change-Id: I9bb676febc80eba277f981f5536a9add48e7f6dd

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn