docs: add id attribute to <book> and <article> elements

this commit was automated; please revert if it causes trouble
for details see http://lists.kde.org/?l=kde-doc-english&m=134965352825792&w=2

SVN_SILENT

doc/index.docbook

@@ -69,9 +69,9 @@
   <!ENTITY cmd-refresh-build '<link linkend="cmdline-refresh-build">--refresh-build</link>'>
 ]>
 
-<book lang="&language;">
+<book id="kdesrc-build" lang="&language;">
 
-<bookinfo>
+<book id="kdesrc-build"info>
 <title>&kdesrc-build; Script Manual</title>
 
 <authorgroup id="authors">