packages: add sysprof tool

packages: add sysprof tool

Add sysprof - preformance profiler
for Linux - to the development tools.

Patches for mips/arm are from openembedded
code.

sysprof-cli <outfile> get required events/stack frames.
Next outfile can be loaded/displayed on PC using
sysprof.

Tool using:
- PERF events
- /proc/kallsyms for kernel symbols

You should compile kernel with profiling enabled,
debug information, symbol table information.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@38466 3c298f89-4303-0410-b956-a3cf2f4a3e73