TimeTrace.cc: warn about concurrent log dumps, and skip
TimeTrace.cc: warn about concurrent log dumps, and skip

jblomer/ramcloud,anirajk/RAMCloud,rstutsman/RAMCloud,alexandermerritt/ramcloud,rstutsman/RAMCloud,alexandermerritt/ramcloud,alexandermerritt/ramcloud,jblomer/ramcloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,utah-scs/RAMCloud,utah-scs/RAMCloud,matrix207/RAMCloud,utah-scs/RAMCloud,rstutsman/RAMCloud,matrix207/RAMCloud,rstutsman/RAMCloud,QingkaiLu/RAMCloud,QingkaiLu/RAMCloud,anirajk/RAMCloud,matrix207/RAMCloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,matrix207/RAMCloud,utah-scs/RAMCloud,anirajk/RAMCloud,anirajk/RAMCloud,utah-scs/RAMCloud,QingkaiLu/RAMCloud,jblomer/ramcloud,QingkaiLu/RAMCloud,jblomer/ramcloud,SMatsushi/RAMCloud,alexandermerritt/ramcloud,alexandermerritt/ramcloud,matrix207/RAMCloud,SMatsushi/RAMCloud,jblomer/ramcloud,alexandermerritt/ramcloud,matrix207/RAMCloud,rstutsman/RAMCloud,SMatsushi/RAMCloud,rstutsman/RAMCloud,jblomer/ramcloud,anirajk/RAMCloud