Configure opportunistically picks lfortran

[barracuda156]

lfortran is an experimental compiler and it should not, I believe, be prioritized even if it is installed.
However I get this on macOS Sonoma:

-- Check for working Fortran compiler: /opt/local/bin/lfortran
-- Check for working Fortran compiler: /opt/local/bin/lfortran - broken
CMake Error at /opt/local/share/cmake-3.24/Modules/CMakeTestFortranCompiler.cmake:61 (message):
  The Fortran compiler

    "/opt/local/bin/lfortran"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_StarNEig/StarNEig/work/build/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/usr/bin/make -f Makefile cmTC_5ddb6/fast && /Library/Developer/CommandLineTools/usr/bin/make  -f CMakeFiles/cmTC_5ddb6.dir/build.make CMakeFiles/cmTC_5ddb6.dir/build
    Building Fortran object CMakeFiles/cmTC_5ddb6.dir/testFortranCompiler.f.o
    /opt/local/bin/lfortran   -pipe -Os -m64  -c /opt/local/var/macports/build/_opt_svacchanda_SonomaPorts_math_StarNEig/StarNEig/work/build/CMakeFiles/CMakeTmp/testFortranCompiler.f -o CMakeFiles/cmTC_5ddb6.dir/testFortranCompiler.f.o
    The following arguments were not expected: -m64 -Os -pipe
    Run with --help for more information.
    make[1]: *** [CMakeFiles/cmTC_5ddb6.dir/testFortranCompiler.f.o] Error 109
    make: *** [cmTC_5ddb6/fast] Error 2

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  src/CMakeLists.txt:32 (project)

-- Configuring incomplete, errors occurred!

Needless to say, gfortran is installed and works perfectly fine.