add support to add BUILD_INCLUDE system paths defined from build variants to project configurations.
<?xml version="1.0" encoding="UTF-8"?>
<?NLS TYPE="org.eclipse.help.toc"?>
<toc label="Carbide Help"
link_to="../com.nokia.carbide.help.common/carbideHelpTOC.xml#anchorLegal">
<topic label="Legal" href="html/legal.htm" />
</toc>