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
diff --git a/.gitignore b/.gitignore
index 20adb5a..602e974 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,5 @@
 debian/tmp
 debian/*.log
 debian/*.substvars
+
+contrib/libsmpp34.spec
diff --git a/configure.ac b/configure.ac
index 775b3b7..b25602d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -87,4 +87,5 @@
            def_list/Makefile
            binaries/Makefile
            test_apps/Makefile
-	   libsmpp34.pc])
+	   libsmpp34.pc
+	   contrib/libsmpp34.spec])
diff --git a/contrib/libsmpp34.spec b/contrib/libsmpp34.spec.in
similarity index 96%
rename from contrib/libsmpp34.spec
rename to contrib/libsmpp34.spec.in
index a6dd384..eba7dbd 100644
--- a/contrib/libsmpp34.spec
+++ b/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