Add device/fenv test

See https://android-review.googlesource.com/#/c/48991
Works for GCC 4.6/4.7/clang3.1
ToDo: gcc4.4.3 fails because "as in binutils-2.19 doesn't understand vmrs/vmsr

Change-Id: I1bd25173abcec4bdd152072e5d0b3faf2a7cc984
4 files changed