*chklq: fix test failures when NB=1 with M=N#1298
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The LQ test drivers (dchklq, schklq, cchklq, zchklq) called DGELS/SGELS which re-factorizes AF internally using GEQRF when M>=N. This corrupted the LQ factorization expected by subsequent LQT02/LQT03 calls on later K iterations, causing test(1) and test(2) failures. Fix by re-copying A to AF and re-factorizing with GELQF after the GELS call, restoring the LQ factorization for the remaining tests. Closes Reference-LAPACK#973
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The LQ test drivers (dchklq, schklq, cchklq, zchklq) called DGELS/SGELS which re-factorizes AF internally using GEQRF when M>=N. This corrupted the LQ factorization expected by subsequent LQT02/LQT03 calls on later K iterations, causing test(1) and test(2) failures.
Fix by re-copying A to AF and re-factorizing with GELQF after the GELS call, restoring the LQ factorization for the remaining tests.
Closes #973