Makefile - rename LINUX to UNIX

for generalization
Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Makefile - 新增安裝檔案相關變數

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Makefile - fix wrong option of OPTION_FILE_INSTALLER_UNIX_AUTOMATIC_CREATE_PARENT_DIRECTORY

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>
Makefile: fix wrong DIR_INSTALL_PREFIX_UNIX

Signed-off-by: Ｖ字龍(Vdragon) <pika1021@gmail.com>