science/pcmsolver: Update 1.1.11 -> 1.2.0
Also replaced USES=fortran with LIB_DEPENDS for flang, because USES=fortran:x
breaks for both flang and gfortran.
New port: science/pcmsolver: API for the Polarizable Continuum Model
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D13069