unix/dev/mpconfigvariant.mk: Add commented options for LittleFS1/2.
unix/dev/mpconfigvariant.mk: Add commented options for LittleFS1/2.

These build well. Enabling both adds 40K (x86) to already pretty big
pycopy-dev binary, so keep these at the fingertips, but disabled by
default.

Change-Id: Ie54280820ee0515154f96ef9e81b17c77ed077a9
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython