Use versioned symbols to keep libgfapi at libgfapi.so.0.0.0

Some nits uncovered:

+ there are a couple functions declared that do not have an
  associated definition, e.g. glfs_truncate(), glfs_caller_specific_init()

+ there are five private/internal functions used by heal/src/glfsheal
  and the gfapi master xlator (glfs-master.c): glfs_loc_touchup(),
  glfs_active_subvol(), and glfs_subvol_done(), glfs_init_done(),
  glfs_resolve_at(); which are not declared in glfs.h;

+ for this initial pass at versioned symbols, we use the earliest version
  of all public symbols, i.e. those for which there are declarations in
  glfs.h or glfs-handles.h.
  Further investigation as we do backports to 3.6, 3.4, and 3.4
  will be required to determine if older implementations need to
  be preserved (forward ported) and their associated alias(es) and
  symbol version(s) defined.

FWIW, we should consider linking all of our libraries with a map, it'll
result in a cleaner ABI. Perhaps something for an intern to do or a
Google Summer of Code project.

Change-Id: I64e6860d9ccfa22c40376eef2e1e6ebc0e36f051
BUG: 1160712
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/9058
Tested-by: Gluster Build System <jenkins@build.gluster.com>

Currently gfapi.py only loads libraries by filename ending in ".so".  On
an installed system without development packages, the <lib>.so filenames
are not available. ctypes.util.find_library() can be used to detect the
files dynamically.

In addition to this, also fixing some minor indention errors and package
the library into the Python site-packages path. Python applications and
libraries can now access libgfapi through 'from glusterfs import gfapi'.

Change and review in the master branch:
> Change-Id: I71e38dabd3ade5dcf24813bf2fc25cda91b571c6
> Signed-off-by: Niels de Vos <ndevos@redhat.com>
> Reviewed-on: http://review.gluster.org/5835
> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

BUG: 1005146
Change-Id: Id7665fe5140111be7bf2038454fb775c70b15993
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/6581
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

cherry-pick from master, including commits:
 5d3b478e76f1015b11bfd7d48465ab12a4f0737e
 fd407a4f5cdb869dc52efe8fc9e1d284f60f5992
 6f6789884227b8260f140c39c063d77b0516af97
 84f5e4b354526fbb7f0665345816e81c81245c8f
 2398e1e0da61f4ec5f209c704e037b54b5c249e1

Resync with Fedora's glusterfs.spec

To build a set of RPMs:
 % ./autogen.sh
 % ./configure --enable-fusermount
 % make dist
 % cd extras/LinuxRPM && make glusterrpms

Updated rpm.t

BUG: 819130
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
Change-Id: Ib73be0fbb7ee16a5c41b4f7c7a3f66d0224bfe6c
Reviewed-on: http://review.gluster.org/4725
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

This has been hiding files in my tree, in particular, new directories that end
with an "o". I am guessing here that these are really trying to just ignore
.o, .la and .lo files.

Change-Id: Ic438ca5c43188a63e9840512825f9ba05c359eeb
Signed-off-by: Peter Portante <peter.portante@redhat.com>
Reviewed-on: http://review.gluster.org/4195
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Pete Zaitcev <zaitcev@redhat.com>
Reviewed-by: Anand Avati <avati@redhat.com>

Signed-off-by: Corentin Chary <corentin.chary@gmail.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

Signed-off-by: Anand V. Avati <avati@amp.gluster.com>