Workaround --linux_perf_bts_block flag breakage.
Mateusz reports that running honggfuzz fails as:
[2016-11-11T21:54:27+0000][W][1190] arch_perfOpen():223 mmap(mmapAuxBuf) failed,
try increasing the kernel.perf_event_mlock_kb sysctl (up to even 300000000): Cannot allocate memory
It seems aux data also needs WRITE permissions.
Reported-by: Mateusz Lenik
Package-Manager: portage-2.3.2