Merge pull request #2 from keiichi-hikita/hajime.kondou/SF-140_suse_rpm

change doc to build rpm for opensuse

doc/source/install/build_rpm_packages.rst

@@ -4,8 +4,14 @@ How to Build to RPM Packages
 
 #. Make sure you have rpm-build installed::
 
+ - on Fedora/CentOS/RedHat::
+
     sudo yum install rpm-build
 
+ - on OpenSUSE::
+
+    sudo zypper install rpm-build
+
 #. Thsn type following command at the top of slogging directory::
 
     sudo python setup.py bdist_rpm