Can't get binutils to build on Cygwin

[Eric Christopher]

>> checking for correct version of gmp.h... no
>> checking for bison... no
>> checking for byacc... no
>> checking for yacc... no
>> checking for bison... no
>> checking for gm4... no
>> checking for gnum4... no
>> checking for m4... no
>> checking for flex... no
>> checking for lex... no
>> checking for flex... no
>> checking for makeinfo... makeinfo
>> checking for expect... no
>> checking for runtest... no
> 
> Aren't some of these required?
> 

Not for a release build, no.

-eric