CMakeLists.txt: handle CMAKE_SYSTEM_PROCESSOR "arm64" and "armv8" values

These shall download the "aarch64" lib files

Author: greenrobot

flutter_libs/linux/CMakeLists.txt

@@ -46,6 +46,8 @@ set(OBJECTBOX_VERSION 0.19.0)
 set(OBJECTBOX_ARCH ${CMAKE_SYSTEM_PROCESSOR})
 if (${OBJECTBOX_ARCH} MATCHES "x86_64")
     set(OBJECTBOX_ARCH x64)
+elseif (${OBJECTBOX_ARCH} MATCHES "^arm64" OR ${OBJECTBOX_ARCH} MATCHES "^armv8")
+    set(OBJECTBOX_ARCH aarch64)
 elseif (${OBJECTBOX_ARCH} MATCHES "^armv7")
     set(OBJECTBOX_ARCH armv7hf)
 elseif (${OBJECTBOX_ARCH} MATCHES "^arm")

sync_flutter_libs/linux/CMakeLists.txt

@@ -46,6 +46,8 @@ set(OBJECTBOX_VERSION 0.19.0)
 set(OBJECTBOX_ARCH ${CMAKE_SYSTEM_PROCESSOR})
 if (${OBJECTBOX_ARCH} MATCHES "x86_64")
     set(OBJECTBOX_ARCH x64)
+elseif (${OBJECTBOX_ARCH} MATCHES "^arm64" OR ${OBJECTBOX_ARCH} MATCHES "^armv8")
+    set(OBJECTBOX_ARCH aarch64)
 elseif (${OBJECTBOX_ARCH} MATCHES "^armv7")
     set(OBJECTBOX_ARCH armv7hf)
 elseif (${OBJECTBOX_ARCH} MATCHES "^arm")