ech_key.c: Fix includes
authortb <tb@openbsd.org>
Sun, 2 Jul 2023 02:28:20 +0000 (02:28 +0000)
committertb <tb@openbsd.org>
Sun, 2 Jul 2023 02:28:20 +0000 (02:28 +0000)
commit1f4785513a7efd4efbe8c304ce2dad45bfa1bc69
tree35f4f202c74c7bb480692ff28e41bfcc8ea1837d
parenta3d0b92bc4266f2023b7d0053a62769db183702f
ech_key.c: Fix includes

We need stdint.h for uintptr_t, stdlib.h for malloc, ec.h for various
things, but there's no need for objects. or sha.h.
lib/libcrypto/ecdh/ech_key.c