Disable the remaining x86_64 job on Travis

Add SBGEMM kernel for Cooperlake

Correct misplaced ifdef lines from PR 3360

* Add NO_AVX=1 fallbacks to newer generation x86_64 for completeness

* Update .travis.yml

* Add correct "recursive" option for xlf (from reference-lapack issue 606)

Add workaround for Windows10 macro name clash in small gemm kernel build rules

Allocate an auxiliary struct when running out of preconfigured threads

[win/arm64]: Explicit casting for GEMM_DEFAULT_ALIGN to create 64-bit value

Win64 uses LLP64 datamodel and unsigned long is only 32-bit. For 64-bit
architecture we need 64-bit mask to correctly generate address

Enable existing SBGEMM kernel for Cooperlake by small-matrix path

Add GEMM optimization for small matrix and single/double kernel for skylakex

skylakex sgemv_t kernel fix

Add support for windows/arm64 targets with clang

* Add OSX build job with Homebrew OpenMP in a CMAKE build
* Check install step on OSX/gcc to make sure all include files are generated and installed as intended
* Add mixed clang/gfortran build with cmake on OSX
* move IOS ARMV7/ARMV8 crossbuilds from travis to azure