Factored out common declarations to include/fenv.h and pushed the implementation to .c files. Bug: 11050744 Change-Id: I446b13cc4bc599d328343a8d392b07de280f6304
Rename aarch64 build targets to arm64. The gcc toolchain is still aarch64. Change-Id: Ia92d8a50824e5329cf00fd6f4f92eae112b7f3a3