Add support for compiling with the Fil-C Memory Safe C toolchain #2718

Job	Run time
build-windows (make, gfortran, 1, 0)	5m 55s
build-windows (cmake, gfortran, 1, 1)	13m 12s
build-windows (cmake, gfortran, 1, 0)	17m 21s
xbuild-ios32	7m 28s
build-windows (cmake, gfortran, 0, 1)	24m 11s
build-windows (make, gfortran, 1, 1)	5m 52s
xbuild-ios	7m 18s
build-windows (make, gfortran, 0, 0)	7m 53s
build-windows (cmake, gfortran, 0, 0)	14m 24s
build-windows (make, gfortran, 0, 1)	5m 36s
xbuild-x86_64	10m 59s
	2h 0m 9s

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