Thread is now using quickbook so we have to add a dependency to get it to build, and add it to the path, as it needs to be picked up from the build location.

[SVN r43731]

doc/Jamfile.v2

@@ -41,6 +41,7 @@ boostbook doc
     <dependency>../libs/intrusive/doc//intrusive
     <dependency>../libs/unordered/doc//unordered
     <dependency>../libs/asio/doc//asio
+    <dependency>../libs/thread/doc//thread
 
     ## Add path references to the QuickBook generated docs...
 
@@ -58,6 +59,7 @@ boostbook doc
     <implicit-dependency>../libs/interprocess/doc//interprocess
     <implicit-dependency>../libs/intrusive/doc//intrusive
     <implicit-dependency>../libs/unordered/doc//unordered
+    <implicit-dependency>../libs/thread/doc//thread
 
     <xsl:param>boost.libraries=../../libs/libraries.htm
 

doc/src/boost.xml

@@ -640,7 +640,7 @@
      </libraryinfo>
    </library>
    
-   <xi:include href="../../libs/thread/doc/thread.xml"/>
+   <xi:include href="thread.xml"/>
 
    <library name="Timer" dirname="timer" html-only="1" 
             url="../../libs/timer/index.html">