CMAKE_DEBUG_TARGET_PROPERTIES to `provides information` section

This variable only provides debug information and doesn't modify
the output of CMake, so move it to the correct variable
section.

Help/manual/cmake-variables.7.rst

@@ -45,6 +45,7 @@ Variables that Provide Information
    /variable/CMAKE_CURRENT_LIST_FILE
    /variable/CMAKE_CURRENT_LIST_LINE
    /variable/CMAKE_CURRENT_SOURCE_DIR
+   /variable/CMAKE_DEBUG_TARGET_PROPERTIES
    /variable/CMAKE_DIRECTORY_LABELS
    /variable/CMAKE_DL_LIBS
    /variable/CMAKE_DOTNET_TARGET_FRAMEWORK_VERSION
@@ -158,7 +159,6 @@ Variables that Change Behavior
    /variable/CMAKE_CODELITE_USE_TARGETS
    /variable/CMAKE_COLOR_MAKEFILE
    /variable/CMAKE_CONFIGURATION_TYPES
-   /variable/CMAKE_DEBUG_TARGET_PROPERTIES
    /variable/CMAKE_DEPENDS_IN_PROJECT_ONLY
    /variable/CMAKE_DISABLE_FIND_PACKAGE_PackageName
    /variable/CMAKE_ECLIPSE_GENERATE_LINKED_RESOURCES