Add project logo and source files

The logo contains elements which are in public domain. The gear
has been modified from illustration submitted by 'hank0071' on
OpenClipart and the font used is Open Sans. There seems to be no
restriction on commercial use.
Signed-off-by: Suchakra Sharma <suchakrapani.sharma@polymtl.ca>

README.md

+![BCC Logo](images/logo2.png)
 # BPF Compiler Collection (BCC)
 
 This directory contains source code for BCC, a toolkit for creating small

images/logo1.svg

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images/logo2.svg

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