Option to spit .h instead of .c

[radare]

Just to get the function definitions so it can be used to call functions from an object or dylib without having to do that by hand.

#define FCN
FCN int sumstuff(int a, int b);
FCN void printstring(const char *str);
...

this way the user can later edit this define to be export, static, etc... and write the main at the bottom

[wargio]

shouldn't this be easily done in r2?
i mean seems useful, but i was wondering if it was more appropriate for r2 or r2dec

[elicn]

I would move the "#include" directives there too, instead of appearing on top of every function.