perf_counter tools: fix build error
tree9c5a7990685142a1e8e203a0ed0222a6ab450ea5
-rw-r--r-- 885 .gitignore
-rw-r--r-- 4021 .mailmap
-rw-r--r-- 18693 COPYING
-rw-r--r-- 93847 CREDITS
drwxr-xr-x - Documentation
-rw-r--r-- 2430 Kbuild
-rw-r--r-- 147761 MAINTAINERS
-rw-r--r-- 55014 Makefile
-rw-r--r-- 17080 README
-rw-r--r-- 3172 REPORTING-BUGS
drwxr-xr-x - arch
drwxr-xr-x - block
drwxr-xr-x - crypto
drwxr-xr-x - drivers
drwxr-xr-x - firmware
drwxr-xr-x - fs
drwxr-xr-x - include
drwxr-xr-x - init
drwxr-xr-x - ipc
drwxr-xr-x - kernel
drwxr-xr-x - lib
drwxr-xr-x - mm
drwxr-xr-x - net
drwxr-xr-x - samples
drwxr-xr-x - scripts
drwxr-xr-x - security
drwxr-xr-x - sound
drwxr-xr-x - usr
drwxr-xr-x - virt