qa/valgrind.supp: ignore valgrind leak

qa/valgrind.supp: ignore valgrind leak

<error>
  <unique>0x12ee80e</unique>
  <tid>1</tid>
  <threadname>ceph-mon</threadname>
  <kind>Leak_StillReachable</kind>
  <xwhat>
    <text>8 bytes in 1 blocks are still reachable in loss record 2 of 31</text>
    <leakedbytes>8</leakedbytes>
    <leakedblocks>1</leakedblocks>
  </xwhat>
  <stack>
    <frame>
      <ip>0x4C2AC38</ip>
      <obj>/usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so</obj>
      <fn>operator new[](unsigned long)</fn>
      <dir>/builddir/build/BUILD/valgrind-3.15.0/coregrind/m_replacemalloc</dir>
      <file>vg_replace_malloc.c</file>
      <line>433</line>
    </frame>
    <frame>
      <ip>0xEB02D40</ip>
      <obj>/usr/lib64/libtcmalloc.so.4.4.5</obj>
    </frame>
    <frame>
      <ip>0x400F9B2</ip>
      <obj>/usr/lib64/ld-2.17.so</obj>
      <fn>_dl_init</fn>
    </frame>
    <frame>
      <ip>0x4001179</ip>
      <obj>/usr/lib64/ld-2.17.so</obj>
    </frame>
    <frame>
      <ip>0x5</ip>
    </frame>
    <frame>
      <ip>0x1FFF000BBE</ip>
    </frame>
    <frame>
      <ip>0x1FFF000BC7</ip>
    </frame>
    <frame>
      <ip>0x1FFF000BCA</ip>
    </frame>
    <frame>
      <ip>0x1FFF000BD4</ip>
    </frame>
    <frame>
      <ip>0x1FFF000BD9</ip>
    </frame>
    <frame>
      <ip>0x1FFF000BDC</ip>
    </frame>
  </stack>
</error>

Signed-off-by: Sage Weil <sage@newdream.net>