Add a Z13 build to the Travis configuration (#2542)

Revert 42 z12ci to keep forked develop clean

This reverts commit 7972beb375.

* Add IBM Z to Travis configuration

* Add IBM Z to Travis configuration

rebase

* Add an ARMV7 iOS build on Travis

* thread_local appears to be unavailable on ARMV7 iOS

* Add no-thumb option for ARMV7 IOS build to get it to accept DMB ISH

* Make local labels in macros of nrm2_vfpv3.S compatible with the xcode assembler

Add "recursive" option for LAPACK builds with ifort or pgfort as well

as shown in Reference-LAPACK issue 401 (their PR 403)

Fix zero initialization for beta=0 case

use immediate initialization instead of multiplication in case register content is a NaN

Fix avx512 sgemm performance bug when ldc is a multiple of 1024

Use runtime check for AVX512 capability in DYNAMIC_ARCH builds made on SKX

rebase

Add message highlighting minimum target choice at end of DYNAMIC_ARCH…

add ctest for drotm and modified ctest for drot.

related to #2526

Avoid calling DIRECT codepath in DYNAMIC_ARCH on non-SKX

make sure that test cases cover all code path when kernel uses looping unrolling.

Use proper extension on the avx512 testcase filename

Fix ARCHCONFIG for Neoverse-N1

../config_kernel.h:24:9: warning: missing whitespace after the macro name
   24 | #define ARMV8-march armv8.2-a
      |         ^~~~~

The need to call it .tmp existed only when it was generated by a tmpfile call, and the "-x c" option to tell the compiler it is actually a C source is not universally supported (this broke the test with clang-cl at least)

add ctest for srotm and modified ctest for srot.

Fix cmake compilation with ifort on Windows

tentative fix for #2472

rebase

make sure that test cases cover all code path when kernel uses looping unrolling.

Temporary fix for SKX STRSM

[OpenBLAS]: benchmark for her/her2 LEVEL2 functions

[OpenBlas]: Add benchmark tpsv file and modify benchmark/Makefile

AVX2 STRSM kernels