Update lfs simulator's usage text.
Update lfs simulator's usage text.

IMCG/RamCloud,utah-scs/RAMCloud,DavidLi2010/ramcloud,DavidLi2010/ramcloud,alexandermerritt/ramcloud,Frank-Wu/RamCloud,jcarreira/ramcloud,QingkaiLu/RAMCloud,mrdiegoa/ramcloud,behnamm/cs244b_project,mrdiegoa/ramcloud,DavidLi2010/ramcloud,matrix207/RAMCloud,rstutsman/RAMCloud,matrix207/RAMCloud,DavidLi2010/ramcloud,DavidLi2010/ramcloud,Frank-Wu/RamCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,jblomer/ramcloud,rstutsman/RAMCloud,jcarreira/ramcloud,behnamm/cs244b_project,anirajk/RAMCloud,anirajk/RAMCloud,jblomer/ramcloud,y-higuchi/ramcloud,jblomer/ramcloud,Frank-Wu/RamCloud,matrix207/RAMCloud,rstutsman/RAMCloud,Frank-Wu/RamCloud,IMCG/RamCloud,anirajk/RAMCloud,matrix207/RAMCloud,alexandermerritt/ramcloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,mrdiegoa/ramcloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,SMatsushi/RAMCloud,behnamm/cs244b_project,QingkaiLu/RAMCloud,matrix207/RAMCloud,Frank-Wu/RamCloud,utah-scs/RAMCloud,alexandermerritt/ramcloud,alexandermerritt/ramcloud,IMCG/RamCloud,Frank-Wu/RamCloud,jcarreira/ramcloud,mrdiegoa/ramcloud,behnamm/cs244b_project,rstutsman/RAMCloud,anirajk/RAMCloud,mrdiegoa/ramcloud,behnamm/cs244b_project,anirajk/RAMCloud,DavidLi2010/ramcloud,SMatsushi/RAMCloud,y-higuchi/ramcloud,jcarreira/ramcloud,IMCG/RamCloud,matrix207/RAMCloud,utah-scs/RAMCloud,jcarreira/ramcloud,behnamm/cs244b_project,IMCG/RamCloud,QingkaiLu/RAMCloud,utah-scs/RAMCloud,y-higuchi/ramcloud,IMCG/RamCloud,rstutsman/RAMCloud,SMatsushi/RAMCloud,jcarreira/ramcloud,jblomer/ramcloud,utah-scs/RAMCloud,mrdiegoa/ramcloud,y-higuchi/ramcloud,alexandermerritt/ramcloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,y-higuchi/ramcloud,y-higuchi/ramcloud,rstutsman/RAMCloud