RFR (XS) 8191006: hsdis disassembler plugin does not compile with binutils 2.29+

[David Buck]

Hi!

Please review this small fix to allow the hsdis plugin to be built 
against newer versions of binutils (>= 2.29).

bug report: https://bugs.openjdk.java.net/browse/JDK-8191006

webrev: http://cr.openjdk.java.net/~dbuck/8191006.0/

Note that this change will break support for building with older 
versions of binutils. (I am not aware of any reasonable use case for 
building hsdis against older versions of binutils. Please correct me if 
you are aware of any.) Also note that in addition to modifying the call 
to disassembler() to match the new signature, I also changed the include 
order of the header files. It seems that bfd.h now has a new dependency 
on string.h. I took this opportunity to better organize all of the includes.

I kept the changes to the README file to a bare minimum as I hope to do 
a more comprehensive doc update once a few other fixes [0] have been pushed.

I have tested the new changes by building against binutils 2.29, 2.29.1, 
2.30, 2.31, and 2.31.1 on OL7 (amd64). I also built against binutils 
2.31.1 on Solaris 10 (SPARCv9) and Windows 10 / Cygwin (amd64).

Cheers,
-Buck

[0] especially 8208495