64 bit gather/scatter fix for knc.h
added 3.6 sse4-i16x8 compfails to fail_db
add 12 runfails first appeared in LLVM 3.5 trunk on 26/07/14. these are now in trunk 3.6. erroneous commit 213898
compfails also appeared after LLVM commit 214628 (tracker id 20540)
changed examples` debug flags for Windows: added -g, -O2 switched to -O0
made ISPC + LLVM-trunk compile on Windows
removed ugly INT32_MIN define (included limits.h) and updated the copyright
undefined printf functions in knc-i1x16.h