fix blasabs for windows

Bugfix in #1713 for Windows (LLP64), where `blasabs` needs to be `llabs` rather than `labs` for the 64-bit API.

Introduce blasabs macro and use it to switch between abs and labs for INTERFACE64

fabs -> fabsl

Fixes two calls that were using `fabs` on a `long double` argument rather than `fabsl`, which looks like it is doing an unintentional truncation to `double` precision.

Set EXPORT_NAME to match OpenBLASConfig.cmake

Haiku supporting patches

Fix #1705 where we incorrectly calculate page locations.

Since we now use an allocation size that isn't a multiple of PAGESIZE, finding
the pages for run_bench wasn't terminating properly.  Now we detect if we've
found enough pages for the allocation and terminate the loop.

Do not treat WIndows UWB builds as cross-compiling

Unset memory table entry, not just the local pointer to it on shutdown

to fix crash with multiple instances of OpenBLAS, #1692

Temporarily disable special handling of OPENMP thread memory allocation

for issue #1673

Add cpu identification via mfpvr call for the BSDs

Work around utest failures in the MIPS64 SICORTEX target