Added bundled support for Apple Silicon (M1)

[KevinRoebert]

This PR added support for the new Apple Silicon (M1) in bundled mode.

libsodium.dylib v.1.0.18

> lipo -info libsodium.dylib
Non-fat file: libsodium.dylib is architecture: arm64

> openssl sha256 libsodium.dylib
SHA256(libsodium.dylib)= 95bb5a5a302ac76494ff10eea6cc28beb4601805d5c0a052f844464b529a0abc

> make check
PASS: aead_aes256gcm
PASS: aead_aes256gcm2
PASS: aead_chacha20poly1305
PASS: aead_chacha20poly13052
PASS: aead_xchacha20poly1305
PASS: auth
PASS: auth2
PASS: auth3
PASS: auth5
PASS: auth6
PASS: auth7
PASS: box
PASS: box2
PASS: box7
PASS: box8
PASS: box_easy
PASS: box_easy2
PASS: box_seal
PASS: box_seed
PASS: chacha20
PASS: codecs
PASS: core1
PASS: core2
PASS: core3
PASS: core4
PASS: core5
PASS: core6
PASS: ed25519_convert
PASS: generichash
PASS: generichash2
PASS: generichash3
PASS: hash
PASS: hash3
PASS: kdf
PASS: keygen
PASS: kx
PASS: metamorphic
PASS: misuse
PASS: onetimeauth
PASS: onetimeauth2
PASS: onetimeauth7
PASS: pwhash_argon2i
PASS: pwhash_argon2id
PASS: randombytes
PASS: scalarmult
PASS: scalarmult2
PASS: scalarmult5
PASS: scalarmult6
PASS: scalarmult7
PASS: scalarmult8
PASS: secretbox
PASS: secretbox2
PASS: secretbox7
PASS: secretbox8
PASS: secretbox_easy
PASS: secretbox_easy2
PASS: secretstream
PASS: shorthash
PASS: sign
PASS: sodium_core
PASS: sodium_utils
PASS: sodium_version
PASS: stream
PASS: stream2
PASS: stream3
PASS: stream4
PASS: verify1
PASS: sodium_utils2
PASS: sodium_utils3
PASS: core_ed25519
PASS: core_ristretto255
PASS: pwhash_scrypt
PASS: pwhash_scrypt_ll
PASS: scalarmult_ed25519
PASS: scalarmult_ristretto255
PASS: siphashx24
PASS: xchacha20
============================================================================
Testsuite summary for libsodium 1.0.18
============================================================================
# TOTAL: 77
# PASS:  77
# SKIP:  0
# XFAIL: 0
# FAIL:  0
# XPASS: 0
# ERROR: 0
============================================================================

Java

JUnit: 89 Tests passed.

[KevinRoebert]

@gurpreet- would you like to take a look at the PR?

[gurpreet-]

Nice one. I am in the process of updating to libsodium 1.0.18 anyway and this was one of the tasks.