add custom easyblock for RELION

[jfgrimm]

(created using eb --new-pr)

[JuergenUniVie]

lot of wrong links:

./relion_refine_mpi: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.26' not found (required by ./relion_refine_mpi)
linux-vdso.so.1 (0x00007ffc005f8000)
libcufft.so.10 => /usr/local/cuda/targets/x86_64-linux/lib/libcufft.so.10 (0x00007f162eabe000)
libmpi.so.40 => /cluster/GENERIC/software/OpenMPI/4.1.1-GCC-10.3.0/lib/libmpi.so.40 (0x00007f1637650000)
libdl.so.2 => /lib64/libdl.so.2 (0x00007f162e8ba000)
libtiff.so.5 => /lib64/libtiff.so.5 (0x00007f162e641000)
libfftw3f.so.3 => /lib64/libfftw3f.so.3 (0x00007f162e22a000)
libfftw3.so.3 => /lib64/libfftw3.so.3 (0x00007f162de24000)
libcurand.so.10 => /usr/local/cuda/targets/x86_64-linux/lib/libcurand.so.10 (0x00007f162822a000)
libpng16.so.16 => /lib64/libpng16.so.16 (0x00007f1627ff5000)
libjpeg.so.8 => /lib64/libjpeg.so.8 (0x00007f16375a3000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f1627dd5000)
librt.so.1 => /lib64/librt.so.1 (0x00007f1627bcd000)
libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f1627838000)
libm.so.6 => /lib64/libm.so.6 (0x00007f16274b6000)
libgomp.so.1 => /lib64/libgomp.so.1 (0x00007f162727e000)
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f1627066000)
libc.so.6 => /lib64/libc.so.6 (0x00007f1626ca1000)
/lib64/ld-linux-x86-64.so.2 (0x00007f1637549000)
libopen-rte.so.40 => /cluster/GENERIC/software/OpenMPI/4.1.1-GCC-10.3.0/lib/libopen-rte.so.40 (0x00007f1626be9000)
libopen-orted-mpir.so => /cluster/GENERIC/software/OpenMPI/4.1.1-GCC-10.3.0/lib/libopen-orted-mpir.so (0x00007f163759c000)
libopen-pal.so.40 => /cluster/GENERIC/software/OpenMPI/4.1.1-GCC-10.3.0/lib/libopen-pal.so.40 (0x00007f1626b3a000)
libutil.so.1 => /lib64/libutil.so.1 (0x00007f1626936000)
libhwloc.so.15 => /cluster/GENERIC/software/hwloc/2.4.1-GCCcore-10.3.0/lib/libhwloc.so.15 (0x00007f16268dd000)
libpciaccess.so.0 => /cluster/GENERIC/software/libpciaccess/0.16-GCCcore-10.3.0/lib/libpciaccess.so.0 (0x00007f1637590000)
libxml2.so.2 => /cluster/GENERIC/software/libxml2/2.9.10-GCCcore-10.3.0/lib/libxml2.so.2 (0x00007f162676e000)
libz.so.1 => /lib64/libz.so.1 (0x00007f1626556000)
liblzma.so.5 => /cluster/GENERIC/software/XZ/5.2.5-GCCcore-10.3.0/lib/liblzma.so.5 (0x00007f162652e000)
libevent_core-2.1.so.7 => /cluster/GENERIC/software/libevent/2.1.12-GCCcore-10.3.0/lib/libevent_core-2.1.so.7 (0x00007f16264f7000)
libevent_pthreads-2.1.so.7 => /cluster/GENERIC/software/libevent/2.1.12-GCCcore-10.3.0/lib/libevent_pthreads-2.1.so.7 (0x00007f163758c000)
libjbig.so.2.1 => /lib64/libjbig.so.2.1 (0x00007f16262eb000)
libjpeg.so.62 => /lib64/libjpeg.so.62 (0x00007f1626082000)