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

It only does the double precision compile currently.

I realized I didn't finish converting Makefile.system yet, so I made
a note of that.

The main part of this target is looping through the BLAS subfolders
and calling make on them. Need to add CMakeLists.txt for each of these
subfolders.

Doesn't actually run it yet.

Optimizations for steamroller

added Steamroller as a  cpu target

Correct ilaver C declaration

workaround for sandybridge zgemm kernel

add OpenBLAS_VERSION to cmake config file

set OPENBLAS_CMAKE_DIR to <prefix>/lib/cmake/<package_name>

usually these files are more often located in this subdir

changed inline assembler labels to short form

Reported by Julia project. JuliaLang/julia#9084

c_check: set $hostarch to x86_64 instead of amd64

fix fortran compiler detection on FreeBSD

`uname -m` returns "amd64" on some systems.

On FreeBSD, passing extra options to `which` causes it to report a non-zero status:

```
$ which gfortran48 -m64
/usr/local/bin/gfortran48
$ echo $?
1
```

```
$ which gfortran48
/usr/local/bin/gfortran48
$ echo $?
0
```

If you "make PREFIX=/path/to/OpenBLAS install" ,
The config file will be located in /path/to/OpenBLAS/cmake

Then, you can use "find_package(OpenBLAS)" at CMake.
cmake -DOpenBLAS_DIR=/path/to/OpenBLAS/cmake ..