Logic error in CheckLAPACKCompilerFlags.cmake

[rbberger]

Description

https://github.com/Reference-LAPACK/lapack/blob/master/CMAKE/CheckLAPACKCompilerFlags.cmake#L38-L47

This produces the wrong flags in an environment where PE_ENV is CRAY but the Fortran_COMPILER_ID is GNU.

Note, we're not using Cray wrappers at all, they're just loaded by default, but our build uses a native GCC compiler.

Checklist

• I've included a minimal example to reproduce the issue
• I'd be willing to make a PR to solve this issue