Update the location of the bjam docs in the trunk pdf build.

[SVN r64276]

doc/pdf/Jamfile.v2

@@ -77,7 +77,7 @@ install pdf-install
     ../../libs/xpressive/doc//standalone
 
     ../../tools/boostbook/doc//boostbook
-    ../../tools/build/v2/engine/doc//standalone
+    ../../tools/build/v2/doc//jam_docs
     ../../tools/quickbook/doc//standalone
     ../../tools/bcp/doc//standalone
   :