Fixes bug in typed data read/write for floats and doubles.

Fixes bug in typed data read/write for floats and doubles.

When reading from a byte array as floats or doubles, perform the
endianness correction before converting to a float or double
rather than the other way around. This is to avoid floating
point canonicalization changing the bytes before we put them
in the right order.

Unrelatedly, this change also adds armv5te as an architecture
needing extra time for tests to correct an oversight in my
last CL.

R=iposva@google.com

Committed: https://code.google.com/p/dart/source/detail?r=44871

[zra, 2015-04-02 17:46:29]

zra@google.com changed reviewers:
+ iposva@google.com, johnmccutchan@google.com

[Ivan Posva, 2015-04-02 19:34:45]

LGTM -ip

[zra, 2015-04-02 20:22:45]

Committed patchset #2 (id:20001) manually as r44871 (presubmit successful).