Add provisioning for gcc-4.4.1

- compile into linux64Gcc44, linuxGcc44 to avoid clashes during testing
- continue to use gmp-4.2.4 since gmp-4.3.x might be miscompiled with
  a system gcc-4.3.2

wmake/rules/linuxGcc44/mplibHPMPI

@@ -0,0 +1,3 @@
+PFLAGS     =
+PINC       = -I$(MPI_ARCH_PATH)/include -D_MPICC_H
+PLIBS      = -L$(MPI_ARCH_PATH)/lib/linux_ia32 -lmpi