component/python3: do not build nis module

Nis module is linking against system library libnsl which is not slapos compatible.

Also note that we use printf instead of echo here because echo behaviour with \n is different with bash or dash.

component/python3/buildout.cfg

@@ -42,6 +42,7 @@ configure-options =
   --with-openssl=${openssl:location}
 # Profiled build:
   --enable-optimizations
+pre-build = printf '*disabled*\nnis\n' >> Modules/Setup.local
 pre-install = mkdir profile-opt
 
 # the entry "-Wl,-rpath=${file:location}/lib" below is needed by python-magic,