Update architecture check for older cmake

Disable the architecture bit-ness check in the cmake version file in a
way compatible with older versions of CMake that don't support the
ARCH_INDEPENDENT argument.

urdfdom-headers-fedora.patch

@@ -21,8 +21,8 @@ diff -up ./CMakeLists.txt.fedora ./CMakeLists.txt
    ${CMAKE_CURRENT_BINARY_DIR}/${cmake_conf_version_file}
    VERSION "${URDF_VERSION}"
 -  COMPATIBILITY SameMajorVersion)
-+  COMPATIBILITY SameMajorVersion
-+  ARCH_INDEPENDENT)
++  COMPATIBILITY SameMajorVersion)
++  #ARCH_INDEPENDENT)
  install(FILES
    "${CMAKE_BINARY_DIR}/${cmake_conf_file}"
    "${CMAKE_BINARY_DIR}/${cmake_conf_version_file}"

urdfdom-headers.spec

@@ -46,6 +46,8 @@ http://ros.org/wiki/urdf
 
 %install
 %cmake_install
+# Disable bitness check in version file.
+sed -i 's/${CMAKE_SIZEOF_VOID_P}//' %{buildroot}%{_datadir}/%{realname}/cmake/%{realname}-config-version.cmake
 
 %files devel
 %license LICENSE