Add info about bootstrap test.
![C to MIR](c2mir.svg)
## Current state C to MIR compiler
- * In a state of fixing numerous bugs
+ * **On Oct 25 we achieved a successful bootstrap**
+ * `c2m` compiles own sources and generate binary MIR, this binary
+ MIR compiles `c2m` sources again and generate another binary
+ MIR, and the two binary MIR files are identical
+ * The bootstrap test takes about CPU 10 sec (for comparison GCC minimal bootstrap takes about 2 CPU hours)
* Full x86-64 call ABI (multiple return regs, passing structures through regs) is not implemented yet
