AstroBWT algorithm (DERO) support

To test:

- Download https://github.com/deroproject/derosuite/releases/tag/AstroBWT
- Run daemon with `--testnet` in command line

In config.json:
- "coin":"dero"
- "url":"127.0.0.1:30306"
- "daemon:"true"

cmake/astrobwt.cmake

@@ -0,0 +1,36 @@
+if (WITH_ASTROBWT)
+    add_definitions(/DXMRIG_ALGO_ASTROBWT)
+
+    list(APPEND HEADERS_CRYPTO
+        src/crypto/astrobwt/AstroBWT.h
+        src/crypto/astrobwt/sha3.h
+    )
+
+    list(APPEND SOURCES_CRYPTO
+        src/crypto/astrobwt/AstroBWT.cpp
+        src/crypto/astrobwt/sha3.cpp
+    )
+
+    if (XMRIG_ARM)
+        list(APPEND HEADERS_CRYPTO
+            src/crypto/astrobwt/salsa20_ref/ecrypt-config.h
+            src/crypto/astrobwt/salsa20_ref/ecrypt-machine.h
+            src/crypto/astrobwt/salsa20_ref/ecrypt-portable.h
+            src/crypto/astrobwt/salsa20_ref/ecrypt-sync.h
+        )
+
+        list(APPEND SOURCES_CRYPTO
+            src/crypto/astrobwt/salsa20_ref/salsa20.c
+        )
+    else()
+        list(APPEND HEADERS_CRYPTO
+            src/crypto/astrobwt/Salsa20.hpp
+        )
+
+        list(APPEND SOURCES_CRYPTO
+            src/crypto/astrobwt/Salsa20.cpp
+        )
+    endif()
+else()
+    remove_definitions(/DXMRIG_ALGO_ASTROBWT)
+endif()