[v2.0.x] Makefile.am: Keep using libfabric.so.1 as the soname

Since the ABI is still backward compatible, there is no need to bump the
library major version which unnecessarily introduces incompatibilty between
RPM packages due to soname change.

Signed-off-by: Jianxin Xiong <[email protected]>
(cherry picked from commit 7953ad7)

Makefile.am

@@ -223,7 +223,7 @@ src_libfabric_la_LIBADD =
 src_libfabric_la_DEPENDENCIES = libfabric.map
 
 if !EMBEDDED
-src_libfabric_la_LDFLAGS += -version-info 2:0:0
+src_libfabric_la_LDFLAGS += -version-info 27:0:26
 endif
 src_libfabric_la_LDFLAGS += -export-dynamic \
 			   $(libfabric_version_script)
@@ -451,9 +451,6 @@ dist-hook: libfabric.spec
 	cp libfabric.spec $(distdir)
 	perl $(top_srcdir)/config/distscript.pl "$(distdir)" "$(PACKAGE_VERSION)"
 
-install-exec-hook:
-	ln -sf libfabric.so.2 $(DESTDIR)$(libdir)/libfabric.so.1
-
 TESTS = \
 	util/fi_info