Update to lzip version 1.19. This includes the following changes:

• The option '-l, --list' has been ported from lziprecover.
• Don't allow mixing different operations (-d, -l or -t).
• Compression time of option '-0' has been slightly reduced.
• Decompression time has been reduced by 2%.
• A few internal improvements and increasing checking.

Set INSTALL_TARGET=install-strip to strip installed executable.