Add -c-lib option.

Nothing done for windows, someone on windows deal with that!

-c-lib GL will for example, add -lGL alongside -lm in Makefile
Fix typo hc_char -> hx_char. Change %ld to %d in trace printf format.

%ld is for long int, %d for int (and everything smaller)
Add Int16/UInt16/Short/UShort types and their Array specialisations.

Also added proper printf format flags for all the integer types.
add Long, ULong, and Float32 c types.
Merge branch 'genc' of github.com:waneck/haxe-genc into genc