Fix libzfs_core changes to follow GNU libtool guidelines

The GNU libtool documentation states to start with a version of 0:0:0,
rather than 1:1:0. Illumos uses the name libzfs_core.so.1, so to be
consistent, we should go with 1:0:0.

http://www.gnu.org/software/libtool/manual/libtool.html#Updating-version-info

The GNU libtool documentation also provides guidence on how the version
information should be incremented. Doing this does a SONAME bump of the
libzfs and libzpool libraries. This is particularly important on Gentoo
because a SONAME bump enables portage to retain the older libraries
until any packages that link to them are rebuilt. The main example of
this is GRUB2's grub2-mkconfig, which will break unless it is rebuilt
against the new libraries.

Signed-off-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1751

lib/libzfs/Makefile.am

@@ -28,4 +28,4 @@ libzfs_la_LIBADD = \
 	$(top_builddir)/lib/libzpool/libzpool.la
 
 libzfs_la_LIBADD += -lm -ldl $(LIBBLKID)
-libzfs_la_LDFLAGS = -version-info 1:1:0
+libzfs_la_LDFLAGS = -version-info 2:0:0

lib/libzfs_core/Makefile.am

@@ -12,4 +12,4 @@ libzfs_core_la_SOURCES = \
 libzfs_core_la_LIBADD = \
 	$(top_builddir)/lib/libnvpair/libnvpair.la
 
-libzfs_core_la_LDFLAGS = -version-info 1:1:0
+libzfs_core_la_LDFLAGS = -version-info 1:0:0

lib/libzpool/Makefile.am

@@ -100,7 +100,7 @@ libzpool_la_LIBADD = \
 	$(top_builddir)/lib/libnvpair/libnvpair.la
 
 libzpool_la_LIBADD += $(ZLIB)
-libzpool_la_LDFLAGS = -version-info 1:1:0
+libzpool_la_LDFLAGS = -version-info 2:0:0
 
 EXTRA_DIST = \
 	$(top_srcdir)/module/zfs/vdev_disk.c \

rpm/generic/zfs.spec.in

@@ -131,7 +131,7 @@ exit 0
 %doc OPENSOLARIS.LICENSE README.markdown
 %{_sbindir}/*
 %{_bindir}/*
-%{_libdir}/*.so.1*
+%{_libdir}/*.so.*
 %{_mandir}/man1/*
 %{_mandir}/man5/*
 %{_mandir}/man8/*