Bring over r4094 from the hwloc v1.3 branch: add missing HWLOC_PCI_LIBS

This commit was SVN r25759.

The following SVN revisions from the original message are invalid or
inconsistent and therefore were not cross-referenced:
  r4094

opal/mca/hwloc/hwloc131/README-ompi.txt

@@ -1,6 +1,7 @@
 Patches included here in this local copy of hwloc on top of stock
 hwloc 1.3.1 distribution:
 
+- https://svn.open-mpi.org/trac/hwloc/changeset/4094
 - https://svn.open-mpi.org/trac/hwloc/changeset/4100
 - https://svn.open-mpi.org/trac/hwloc/changeset/4102
 - https://svn.open-mpi.org/trac/hwloc/changeset/4104

opal/mca/hwloc/hwloc131/hwloc/src/Makefile.am

@@ -108,7 +108,7 @@ libhwloc_la_LDFLAGS = $(ldflags) -version-number $(libhwloc_so_version) $(HWLOC_
 # intentionally only appears in the installable library)
 
 libhwloc_embedded_la_SOURCES = $(sources)
-libhwloc_embedded_la_LDFLAGS = $(ldflags) $(HWLOC_LIBXML2_LIBS) $(HWLOC_LINUX_LIBNUMA_LIBS)
+libhwloc_embedded_la_LDFLAGS = $(ldflags) $(HWLOC_LIBXML2_LIBS) $(HWLOC_LINUX_LIBNUMA_LIBS) $(HWLOC_PCI_LIBS)
 
 # XML data (only install if we're building in standalone mode)