update to current develop

Optimized ?trtrs

Address minor warnings popping up in gcc7+

* Fix compiler identification and option setting

* Handle BINARY=32 option on X86_64

* Add xGEMM3M unroll parameters for crossbuild-target CORE2

* Replace bogus mingw64/32bit CI job with actual 32bit build

mingw64 is not multilib-capable, so using an x86_64-mingw with BINARY=32 in the CI was not going to work anyway (but build passed while BINARY=32 was ignored).

1. Supply appropriate values for C/Z GEMM unroll when cross-compiling for CORE2 or ARMV7
2. Add the required xLOCAL_BUFFER_SIZE parameters for cross-compiling CORE2
3. Add -DFORCE_<target> option to getarch when building with -DTARGET=target
for #2245

update

Add arch data for cmake cross-compiling to CORE2

as this semi-official beta option has suddenly reverted to a standard x86_64 environment causing spurious failures

possible cgemv,caxpy,cdot fix

Make x86_64 zdot compile with PGI and Sun C again

for #2235

Fix PGI build options (again)

broken by #2222 as CREAL,CIMAG do not expand to a valid lvalue with these compilers

for #2237

Fix 32bit armv8 compilation regression