tde_create_handbook: Add *.gif files to automatically installed.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 6980b57268)

modules/TDEMacros.cmake

@@ -2022,6 +2022,7 @@ function( tde_add_project_docs )
           if( _html_files )
             file( GLOB _htmldoc_files RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}
                   ${DOCS_SOURCE_DIR}/${_dir}/*.css
+                  ${DOCS_SOURCE_DIR}/${_dir}/*.gif
                   ${DOCS_SOURCE_DIR}/${_dir}/*.jpg
                   ${DOCS_SOURCE_DIR}/${_dir}/*.png
             )
@@ -2192,6 +2193,7 @@ macro( tde_create_handbook )
     file( GLOB _srcs
       ${_source_basedir}/*.docbook
       ${_source_basedir}/*.css
+      ${_source_basedir}/*.gif
       ${_source_basedir}/*.jpg
       ${_source_basedir}/*.png
     )