discrepancies in installation after 'make install-bin-extras'

[liamstask]

I am observing a couple discrepancies between my local installation via Makfile and a freshly unpacked linux binary from code sourcery. Namely:

• none of the linker include files are copied over (*.inc) - looks like this one is pretty easy to fix
• I get some .la copies of some of the normal .a libs (libstdc++.la and libsupc++.la in addition to the .a versions of each in arm-none-eabi/lib/thumb, for example)
• at least one file that doesn't exist at the corresponding location in the unpacked binary version: i see libiberty.a at arm-none-eabi/lib/thumb and arm-none-eabi/lib, for example, while it does not appear in either of those locations normally.

For the 2nd and 3rd issues, there may be more examples of this throughout the installation, but those are the ones that jumped out at me.