contrib: integrate RPM spec

Remove OpenSUSE bug report link, set version to @VERSION@, make it build with
CentOS 8 etc.

Related: OS#4550
Change-Id: If771c1298c84868a9ab0b0aba8d26325c3d810e8

.gitignore

@@ -19,3 +19,5 @@ debian/autoreconf*
 debian/tmp
 debian/*.log
 debian/*.substvars
+
+contrib/libsmpp34.spec

configure.ac

@@ -87,4 +87,5 @@ AC_OUTPUT([Makefile
            def_list/Makefile
            binaries/Makefile
            test_apps/Makefile
-	   libsmpp34.pc])
+	   libsmpp34.pc
+	   contrib/libsmpp34.spec])

contrib/libsmpp34.spec.in

@@ -13,12 +13,9 @@
 # license that conforms to the Open Source Definition (Version 1.9)
 # published by the Open Source Initiative.
 
-# Please submit bugfixes or comments via http://bugs.opensuse.org/
-#
-
 %define sover 1
 Name:           libsmpp34
-Version:        1.14.0.1
+Version:        @VERSION@
 Release:        0
 Summary:        PDU SMPP packaging and unpackaging tool
 License:        GPL-2.0-or-later AND LGPL-2.1-or-later