Fix OpenMPI OS dependencies for Debian and Ubuntu

OpenMPI-1.6.4-GCC-4.7.2.eb had an OS dependency on libibverbs-devel,
which is a package found in RHEL-based distros and Fedora. In Debian
and Ubuntu, this package is called libibverbs-dev. In this commit I
added an OS_NAME check to make the libibverbs-devel check conditional
on running RHEL, etc. and added a check for the correct package name
on Debian.

I also added the same check into OpenMPI-1.6.4-GCC-4.6.4.eb because
it has the same dependency, and this easyconfig is used for the
goolfc-1.3.12 toolchain.

easybuild/easyconfigs/o/OpenMPI/OpenMPI-1.6.4-GCC-4.6.4.eb

@@ -16,6 +16,12 @@ configopts += '--enable-mpirun-prefix-by-default '  # suppress failure modes in
 configopts += '--with-hwloc=$EBROOTHWLOC '  # hwloc support
 configopts += '--disable-dlopen '  # statically link component, don't do dynamic loading
 
+# needed for --with-openib
+if OS_NAME in ['redhat', 'fedora', 'RHEL', 'SL', 'centos']:
+    osdependencies = ['libibverbs-devel']
+elif OS_NAME in ['debian', 'ubuntu']:
+    osdependencies = ['libibverbs-dev']
+
 sanity_check_paths  =  {
                         'files': ["bin/%s" % binfile for binfile in ["ompi_info", "opal_wrapper", "orterun"]] +
                                  ["lib/lib%s.%s" % (libfile, shared_lib_ext) for libfile in ["mpi_cxx", "mpi_f77" ,"mpi_f90",

easybuild/easyconfigs/o/OpenMPI/OpenMPI-1.6.4-GCC-4.7.2.eb

@@ -17,7 +17,10 @@ configopts += '--with-hwloc=$EBROOTHWLOC '  # hwloc support
 configopts += '--disable-dlopen '  # statically link component, don't do dynamic loading
 
 # needed for --with-openib
-osdependencies = ['libibverbs-devel']
+if OS_NAME in ['redhat', 'fedora', 'RHEL', 'SL', 'centos']:
+    osdependencies = ['libibverbs-devel']
+elif OS_NAME in ['debian', 'ubuntu']:
+    osdependencies = ['libibverbs-dev']
 
 sanity_check_paths = {
     'files': ["bin/%s" % binfile for binfile in ["ompi_info", "opal_wrapper", "orterun"]] +