Add ARMv7 target

[PAStheLoD]

Hello!

First of all thanks for this very easy to use cross-compiler magic-bag-of-tools-that-just-work!

Then, my question is, could you add an option to target ARMv7?

[dlecan]

Thank you!

You can already execute code compiled for ARMv6 on an ARMv7 device.
But I agree with you that specific ARMv7 optimizations will be missing.