Fix NEON build flags: in the current NDK, at least with the clang-3.5 toolchain, -mfpu=neon is not enough to activate NEON, since it's incompatible with the default float ABI, and I have to pass -mfloat-abi=softfp (which is what everyone does in practice). In fact, it would be a good idea to pass -mfloat-abi=softfp all the time, regardless of NEON. Also removing the -mcpu=cortex-a8, as 1) it's not needed and 2) if we really wanted to pass a specific -mcpu flag, that would presumably to tune performance for benchmarks, and it would then not really make sense to tune for the very old cortex-a8 (it reflects ARM CPUs from 5 years ago).
Fix NEON build flags: in the current NDK, at least with the clang-3.5 toolchain,
-mfpu=neon is not enough to activate NEON, since it's incompatible with the default float ABI,
and I have to pass -mfloat-abi=softfp (which is what everyone does in practice).
In fact, it would be a good idea to pass -mfloat-abi=softfp all the time, regardless of NEON.
Also removing the -mcpu=cortex-a8, as 1) it's not needed and 2) if we really wanted to pass
a specific -mcpu flag, that would presumably to tune performance for benchmarks, and it would
then not really make sense to tune for the very old cortex-a8 (it reflects ARM CPUs from 5 years ago).

pthulhu/eigen,pthulhu/eigen,pthulhu/eigen,pthulhu/eigen,pthulhu/eigen