Allow install of binutils and import texinfo

- Enable installing binutils from the base system.

- Import texinfo which is required for the binutils tools
to be compiled.

- Also adapted the f

Allow install of binutils and import texinfo

- Enable installing binutils from the base system.

- Import texinfo which is required for the binutils tools
to be compiled.

- Also adapted the fetch rules to correctly generate the
gitignore files for gcc, and allow the case of multiple
modules in the same directory, as found in gnu/dist.

Warning: This patch has an entry in docs/UPDATING

Change-Id: Ib781734e8fd7f9c6265fa65d62ba2cf3fccbc5ba

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