fbtl-posix: link to common_ompio

The posix fbtl calls mca_common_ompio_progress(), which resides in
common/ompio (i.e., libmca_common_ompio.la).  So add that into
mca_fbtl_posix_la_LIBADD (like we do in a few other OMPIO-based
components).  Failure to do this *can* lead to the posix fbtl
component failing to load (depending on whether other OMPIO-based
components that pull in libmca_common_ompio were loaded first).

Thanks to Honggang Li for raising the issue.

Signed-off-by: Jeff Squyres <jsquyres@cisco.com>

Author: jsquyres

ompi/mca/fbtl/posix/Makefile.am

@@ -34,7 +34,8 @@ mcacomponentdir = $(ompilibdir)
 mcacomponent_LTLIBRARIES = $(component_install)
 mca_fbtl_posix_la_SOURCES = $(sources)
 mca_fbtl_posix_la_LDFLAGS = -module -avoid-version
-mca_fbtl_posix_la_LIBADD = $(top_builddir)/ompi/lib@OMPI_LIBMPI_NAME@.la
+mca_fbtl_posix_la_LIBADD = $(top_builddir)/ompi/lib@OMPI_LIBMPI_NAME@.la \
+    $(OMPI_TOP_BUILDDIR)/ompi/mca/common/ompio/libmca_common_ompio.la
 
 noinst_LTLIBRARIES = $(component_noinst)
 libmca_fbtl_posix_la_SOURCES = $(sources)