configure script may use wrong zlib and bzlib libraries for mpicc tests

The configure script tests for zlib and bzlib for use in the support tools (darshan-parser, etc.) however those flags get carried through for tests using the MPICC compiler.

configure:4399: checking for MPI-IO support in MPI configure:4419: //mpicc -o conftest -g -O2 -I/usr/include -I/usr/include -L/usr/lib -L/usr/lib conftest.c -lbz2 -lz >&5 //ld: cannot find -lbz2