Bug#811210: mpicxx.h always errors out with an unfullfillable compiler check

[Matthias Klose]

Package: src:mpich
Version: 3.2-4
Severity: grave
Tags: sid stretch
/usr/include/mpich/mpicxx.h reads

#ifdef __GNUC__
# if __GNUC__ >= 5
#  if __GNUC_MINOR__ > 2 && 3 == 2
#  error 'Please use the same version of GCC and g++ for compiling MPICH and 
user MPI programs'
#  endif
# endif
#endif

so this always errors out. Proposing to limit this check to the major version, 
or completely remove it.