As we are compiling `ctpp2c` in static native and install it with a simple
`cp`, the default compilation of ctpp2 library should not install ctpp2c.
Else we would have a wrong `ctpp2c` in the path and later compilation will
fail.
We are using `ctpp2c` when building kiwix-lib to compile embedded resources.
As `ctpp2c` will be used in the host machine, it always need to be
compiled for the host (native).
But we still want tho ctpp2 library compiled for the target platform.
As we don't want handle the conflict between two dynamic lib with the same
name but for two different platforms, we build ctpp2c statically.
