community/arpack: build with -fallow-argument-mismatch

arpack fails to build with:

Error: Rank mismatch between actual argument at (1) and actual
argument at (2) (scalar and rank-1)

According to 1 and 2, this is common for older fortran code. To get arround it, you can pass -fallow-argument-mismatch to the fortran compiler.

@jirutka It fails to build now for 3.13. This seems to fix it.

assigned to @jirutka

merged