Added missing file from previous commit.

Moved add_dune_<package>_flags functions out of the
Find<Package>.cmake modules, as they were missing with set
CMAKE_DISABLE_<Package>=TRUE.

Now they are in speparte modules Add<Package>Flags and thus can be
used as exspected with disabled packages.

[[Imported from SVN: r7464]]

cmake/modules/UseInkscape.cmake

+# Module that provides convertion routines using inkscape
+#
+# Provides the following functions:
+#
+# inkscape_generate_png_from_svg([OUTPUT_DIR <output_dir>] <pngfile1.png> [<pngfile2.png> ....])
+#
+# Generates pngfile1, ... from svg input files pngfile1.svg, ....
+# The output directory can be specified with the option OUTPUT_DIR. If it is omitted
+# the files will be generated in CMAKE_CURRENT_BINARY_DIR.
+
+include(CMakeParseArguments)
+
+function(inkscape_generate_png_from_svg)
+  if(NOT INKSCAPE)
+    return()
+  endif(NOT INKSCAPE)
+  cmake_parse_arguments(INKSCAPE "" "OUTPUT_DIR;DPI" "" ${ARGN})
+  if(NOT INKSCAPE_OUTPUT_DIR)
+    set(INKSCAPE_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  endif(NOT INKSCAPE_OUTPUT_DIR)
+  if(NOT INKSCAPE_DPI)
+    set(INKSCAPE_DPI 90)
+  endif(NOT INKSCAPE_DPI)
+
+  foreach(pic ${INKSCAPE_UNPARSED_ARGUMENTS})
+    string(REGEX REPLACE "\\.[a-zA-Z]+" ".svg" input ${pic})
+    add_custom_command(OUTPUT ${pic}
+      COMMAND ${INKSCAPE} --export-dpi=${INKSCAPE_DPI} -e ${pic} ${CMAKE_CURRENT_SOURCE_DIR}/${input}
+      DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${input}
+      COMMENT "Generating ${INKSCAPE_OUTPUT_DIR}/${pic} from ${CMAKE_CURRENT_SOURCE_DIR}/${input}"
+      WORKING_DIRECTORY  ${INKSCAPE_OUTPUT_DIR})
+  endforeach(pic)
+endfunction(inkscape_generate_png_from_svg)
+
+function(inkscape_generate_eps_from_svg)
+  cmake_parse_arguments(INKSCAPE "" "INPUT_DIR;OUTPUT_DIR;DPI" "" ${ARGN})
+  if(NOT INKSCAPE_INPUT_DIR)
+    set(INKSCAPE_INPUT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+  endif(NOT INKSCAPE_INPUT_DIR)
+  if(NOT INKSCAPE_INPUT_DIR)
+    set(INKSCAPE_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  endif(NOT INKSCAPE_INPUT_DIR)
+
+  foreach(_pic ${INKSCAPE_UNPARSED_ARGUMENTS})
+    string(REGEX REPLACE "\\.[a-zA-Z]+" ".png" input "${_pic}")
+    string(REGEX REPLACE "\\.[a-zA-Z]+" ".svg" svginput "${_pic}")
+
+    add_custom_target(${input}
+      COMMAND ${INKSCAPE} --export-dpi=${INKSCAPE_DPI} -e ${input} ${CMAKE_CURRENT_SOURCE_DIR}/${svginput}
+      COMMENT "Generating ${INKSCAPE_OUTPUT_DIR}/${svginput} from ${CMAKE_CURRENT_SOURCE_DIR}/${input}")
+    add_custom_command(OUTPUT ${_pic}
+      COMMAND ${CONVERT} ${INKSCAPE_OUTPUT_DIR}/${input} EPS:${_pic}
+      DEPENDS ${input}
+      COMMENT "Converting ${INKSCAPE_OUTPUT_DIR}/${input} to ${INKSCAPE_OUTPUT_DIR}/${_pic}"
+      WORKING_DIRECTORY  ${INKSCAPE_OUTPUT_DIR})
+  endforeach(_pic ${INKSCAPE_UNPARSED_ARGUMENTS})
+endfunction(inkscape_generate_eps_from_svg)