memtest: add new application build which links against barrelfish_mcn instead of barrelfish
--------------------------------------------------------------------------
[ build application { target = "memtest", cFiles = [ "memtest.c" ] },
+ build application { target = "memtest_mcn",
+ cFiles = [ "memtest.c" ],
+ libraryOs = "barrelfish_mcn"
+ },
build application { target = "mem_alloc", cFiles = [ "mem_alloc.c" ],
addLibraries = [ "rcce_nobulk" ] },
build application { target = "mem_free", cFiles = [ "mem_free.c" ] }
