science/mpb: Update to 1.11.1

Changelog: https://github.com/NanoComp/mpb/blob/master/NEWS.md

• Update from version 1.5 to 1.11.1
• Change MASTER_SITES to Github releases
• Remove MAKE_JOBS_UNSAFE
• Change dependency math/fftw to math/fftw3
• Change dependency math/blas to math/openblas
• Add devel/boehm-gc-threaded to LIB_DEPENDS
• Add USES=readline
• Use GCC compiler because of Fortran code
• Reorder Makefile
• Add option for OpenMP
• Remove post-patch target
• Add post-install target to install examples
• Change URL in pkg-descr
• Update pkg-plist

Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D27031