Require libarchive 3.0.0 or later

Older versions do not provide archive_entry_copy_sourcepath_w.

CMakeLists.txt

@@ -336,7 +336,7 @@ macro (CMAKE_BUILD_UTILITIES)
   #---------------------------------------------------------------------
   # Build or use system libarchive for CMake and CTest.
   if(CMAKE_USE_SYSTEM_LIBARCHIVE)
-    find_package(LibArchive)
+    find_package(LibArchive 3.0.0)
     if(NOT LibArchive_FOUND)
       message(FATAL_ERROR "CMAKE_USE_SYSTEM_LIBARCHIVE is ON but LibArchive is not found!")
     endif()