Fix radiff2, Ps segfaults and ARC syntax

- Fix some nullptr derefs on uninitialized graphdiff structs
- 'ar' is now r_cons compliant and rnum friendly (add arj)
- Fix some arc disasm syntax issues
- Fix segfault when saving analysis info in projects
- ARCompact analysis needs to be rewritten
Add -static-libgcc for mingw32 builds
Fix ARCompact disassembly
Fix strcpy on overlapped region
Fix another overlapped strcpy
Fix java nop opcode analysis
Fix some more regression tests. Implement ahc/ahf, COND,REP are now op flags
Script for converting *.idc to radare2 format
Fix #277 - Segfault in radiff2 - Thanks nibble!