The level3 object names should now be correct.

Fixed the code array not getting reset on subsequent AllCombinations
calls.

Since the objects are the same, could generate SINGLE/COMPLEX/etc here
without having to rewrite all the object enumeration code again.

This function takes a set of sources and a set of preprocessor
definitions. It will iterate over the sources and build an object
file for each combination of preprocessor definitions for each
source file.

Added a rather convoluted CMake function to find all combinations
of a given list. This will be useful for the object files that are
compiled multiple times with different combinations of preprocessor
definitions.

Still isn't parsed into CMake variables, and getarch_2 needs to
get the same treatment.

get_nprocs() is a GNU convenience function equivalent to POSIX2008
sysconf(_SC_NPROCESSORS_ONLN); the latter should be available in unistd.h
on any current *nix. (OS X supports this call since 10.5, and FreeBSD
currently supports it. But this commit does not change FreeBSD or OS X
versions.)

The user can use char * openblas_get_config() or char * openblas_get_corename().

Conflicts:
	driver/others/memory.c

Signed-off-by: Timothy Gu <timothygu99@gmail.com>