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crusher: update build to work with craype-accel-amd-gfx90a module via --with-openmp=1

Satish Balay requested to merge balay/update-crusher into release

And:

   Cray: configure try LIBS=-lmpifort_cray (equivalent)
    
    This avoids auto-detection of fortran libraries - that can pick up -ltcmalloc_minimal
    If -lpetsc is created by linking in -ltcmalloc_minimal - it can trigger fortran runtime errors
    
    > /workspace/crayftn/craylibs/google-perftools/src/tcmalloc.cc:647] Attempt to free invalid pointer: 0x1673800
    
    An alternative is to use "FFLAGS=-hsystem_alloc"
Edited by Satish Balay

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