[BUG] Corrects exceptions thrown in opencl tests qr, rank & solve #3398
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Exception 0x5 was thrown in the tests qr_dense_opencl, rank_dense_opencl & solve_dense_opencl.
Description
Bug fixing.
Exceptions are thrown on AMD iGPU A10-7870K (GTX-750 Ti did run without showing errors).
Backporting to 3.8 is possible, since MAGMA code remained untouched as well as the interfaces.
Changes to Users
Improved stability.
Checklist