Add binutils 2.38 and libtool 2.4.7

[doraskayo]

Overview

This PR adds binutils 2.38 to the bootstrap process. Introducing libtool 2.4.7 as well helped avoid configuration issues, and building after gcc 4.7.4 allowed a minimal amount of patching and workarounds during compilation.

libtool is built as early as its minimal requirements are met. It did require a small workaround in gcc 4.7.4 caused by this package relying upon an older automake version relatively late in the bootstrap. The workaround did not affect the actual resulting package.

I chose binutils 2.38 because I already build it successfully on the freedesktop-sdk side, and wanted to be on the safe side when attempting to bootstrap it in live-bootstrap. I assume it should be possible to update to 2.39 without much trouble in the future.

See commit messages for more information.

Testing

I used both the qemu and bwrap bootstrap modes in my tests. I bootstrapped each commit individually, and verified that hashes remain stable through multiple bootstrap exectutions.

cc: @stikonas, @fosslinux

[doraskayo]

@fosslinux, as expected, there wasn't any change in package hashes after regenerating the various pregenerated files you mentioned.

[stikonas]

We missed at least one pregenerated file...

libtool/lib/uniwidth/width0.h libtool/lib/uniwidth/width2.h