Add an optional release version suffix to RPM templates (#569)

We can use this RPM macro to optionally append a build stamp to the
release version at build time. This is necessary to achieve the same
non-abi-compatible scheme as is used in the ROS debian packages.

Author: cottsay

bloom/generators/rpm/templates/ament_cmake/template.spec.em

@@ -4,7 +4,7 @@
 
 Name:           @(Package)
 Version:        @(Version)
-Release:        @(RPMInc)%{?dist}
+Release:        @(RPMInc)%{?dist}%{?release_suffix}
 Summary:        ROS @(Name) package
 
 License:        @(License)

bloom/generators/rpm/templates/ament_python/template.spec.em

@@ -4,7 +4,7 @@
 
 Name:           @(Package)
 Version:        @(Version)
-Release:        @(RPMInc)%{?dist}
+Release:        @(RPMInc)%{?dist}%{?release_suffix}
 Summary:        ROS @(Name) package
 
 License:        @(License)

bloom/generators/rpm/templates/catkin/template.spec.em

@@ -4,7 +4,7 @@
 
 Name:           @(Package)
 Version:        @(Version)
-Release:        @(RPMInc)%{?dist}
+Release:        @(RPMInc)%{?dist}%{?release_suffix}
 Summary:        ROS @(Name) package
 
 License:        @(License)

bloom/generators/rpm/templates/cmake/template.spec.em

@@ -4,7 +4,7 @@
 
 Name:           @(Package)
 Version:        @(Version)
-Release:        @(RPMInc)%{?dist}
+Release:        @(RPMInc)%{?dist}%{?release_suffix}
 Summary:        ROS @(Name) package
 
 License:        @(License)