(Trivial) optimized dsdot implementation for HASWELL

ARM64: Convert all labels to local labels

While debugging/profiling applications using perf or other tools, the
kernels appear scattered in the profile reports. This is because the labels
within the kernels are not local and each label is shown as a separate
function.

To avoid this, all the labels within the kernels are changed to local
labels.

Fix 32bit HASWELL builds

Make ReLAPACK available in cmake builds

Update README.md to include POWER8

Add POWER 8 to the list of additional architectures.

* prebuild.cmake: Put quotes around path names that may contain whitespace
(Copied from alexkaratakis' PR #1295)
* kernel/CMakeLists.txt: Fix common_lapack header inclusion and DYNAMIC_ARCH generation of ?neg_tcopy and ?laswp_ncopy files
* lapack/CMakeLists.txt: Use correct template for ?laswp_(plus,minus) functions

2D thread distribution for multi-threaded GEMMs

Fix out-of-bounds memory accesses exposed by xccblat3 testcase

Save and restore VSX registers

...and does not appear to be needed even when it stays within the bounds of the array

CMake improvements

Variable thread count for multi-threaded GEMMs

Allows maximum use of available cores if one of M and N is small and the other is large.

Add trivial smoketest for xpotrf

m, n, and k can be set to arbitrary constants. A and B matrices can be transposed independently.

Rewrite NOFORTRAN conditionals

... so that they do not trigger accidentally when NOFORTRAN is empty/unset

Added mips I6500 core

Signed-off-by: Shivraj Patil <shivraj.patil@imgtec.com>

Add support for TARGET=ZARCH_GENERIC and TARGET=Z13