Incomplete tests for non-android arm & mips.

[luqmana]

run-pass/intrinsic-alignment.rs and run-pass/rec-align-u64.rs don't run on non-android arm/mips since we haven't filled in a cfg for it. So they just fail with 'no main function'.

Pretty easy to fix: determine the right values for alignment/size and fill in the values.

[steveklabnik]

Triage: it looks like arm may have been added, but not mips.

[AnthonyBroadCrawford]

@steveklabnik may I please take this?

[brson]

Looks fixed to me. Both tests now cover all hardware architectures with one path for x86 and one for every other.