Add missing separator to package builds

Author: solidpixel

CMakeLists.txt

@@ -215,7 +215,7 @@ if(PACKAGE)
 
     set(PKG_VER ${CMAKE_PROJECT_VERSION_MAJOR}.${CMAKE_PROJECT_VERSION_MINOR})
 
-    set(CPACK_PACKAGE_FILE_NAME "astcenc-${PKG_VER}-${PKG_OS}${PACKAGE}")
+    set(CPACK_PACKAGE_FILE_NAME "astcenc-${PKG_VER}-${PKG_OS}-${PACKAGE}")
     set(CPACK_INCLUDE_TOPLEVEL_DIRECTORY FALSE)
     set(CPACK_PACKAGE_CHECKSUM SHA256)
     set(CPACK_GENERATOR ZIP)