For Travis CI - wrap the 'make package' inside 'setarch' command.

Related to fc14b30e42ab7ef360f6de5976e445fb364224b7. [ci package]

CMakeLists.txt

@@ -136,7 +136,7 @@ if (URHO3D_64BIT)
     set (CPACK_SYSTEM_NAME ${CPACK_SYSTEM_NAME}-64bit)
 else ()
     set (CPACK_DEBIAN_PACKAGE_ARCHITECTURE i386)
-    set (CPACK_RPM_PACKAGE_ARCHITECTURE i686)       # On RPM-based host systems such as Fedora or RedHat, the 'package' target should be built with the help of 'setarch i686' command
+    set (CPACK_RPM_PACKAGE_ARCHITECTURE i686)       # The 'package' target should be built with the help of 'setarch i686' command on a 64-bit host system
 endif ()
 set (CPACK_SYSTEM_NAME ${CPACK_SYSTEM_NAME}-${URHO3D_LIB_TYPE})
 if (WIN32 AND NOT URHO3D_OPENGL)

Rakefile

@@ -313,7 +313,8 @@ task :ci_package_upload do
     if ENV['URHO3D_USE_LIB64_RPM']
       system "cd ../Build && cmake . -DURHO3D_USE_LIB64_RPM=#{ENV['URHO3D_USE_LIB64_RPM']}" or abort 'Failed to reconfigure to generate 64-bit RPM package'
     end
-    system 'cd ../Build && make package' or abort 'Failed to make binary package'
+    wrapper = ENV['CI'] && ENV['URHO3D_64BIT'] ? 'setarch i686' : ''
+    system "cd ../Build && #{wrapper} make package" or abort 'Failed to make binary package'
   end
   # Determine the upload location
   setup_digital_keys