Full libsodium build

[aidantwoods]

I re-ran dist-build/apple-xcframework.sh from libsodium with LIBSODIUM_FULL_BUILD=1, and manually corrected the file Sodium/libsodium/version.h to match. For the sake of simplicity about what actually changed, I also re-ordered the AvailableLibraries array in Clibsodium.xcframework/Info.plist from what was output by this script so as to match the current file ordering (and therefore this file is now unchanged).

This was run using Xcode 12.5.1 on revision 7d71804ee05f71b65c94282f706c5aa82b279e8a of libsodium (as currently documented in the readme).

This exposes some currently missing functionality from Clibsodium

swift-sodium/Sodium/libsodium/sodium_lib.h

Lines 56 to 67 in 1d51e8e

	#ifndef SODIUM_LIBRARY_MINIMAL
	# include "crypto_box_curve25519xchacha20poly1305.h"
	# include "crypto_core_ed25519.h"
	# include "crypto_core_ristretto255.h"
	# include "crypto_scalarmult_ed25519.h"
	# include "crypto_scalarmult_ristretto255.h"
	# include "crypto_secretbox_xchacha20poly1305.h"
	# include "crypto_pwhash_scryptsalsa208sha256.h"
	# include "crypto_stream_salsa2012.h"
	# include "crypto_stream_salsa208.h"
	# include "crypto_stream_xchacha20.h"
	#endif

Even though this doesn't change the swift library, I think it makes sense for this package to make all of libsodium available in-case any of the low level functionality is needed?

I've opened this PR for convenience, but I won't be offended if you prefer to build the modified binaries yourself :)

Closes #248

[johnalanwoods]

nice, this would be useful.