[yocto] [PATCH 13/14] documentation: update documentation for SRCREV variable

[Paul Eggleton]

* Add note about specifying a full revision ID to prevent querying the
  remote server on every parse
* Mercurial also supports this variable

Signed-off-by: Paul Eggleton <paul.eggleton at linux.intel.com>
---
 documentation/poky-ref-manual/ref-variables.xml |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/documentation/poky-ref-manual/ref-variables.xml b/documentation/poky-ref-manual/ref-variables.xml
index b6bf97a..7c68023 100644
--- a/documentation/poky-ref-manual/ref-variables.xml
+++ b/documentation/poky-ref-manual/ref-variables.xml
@@ -923,7 +923,11 @@ recipes-graphics/xorg-font/fiont-alias_1.0.2.bb:PR - "$(INC_PR).0"
             <glossdef>
                 <para>
                     Revision of source code used to build package (Subversion,
-                    GIT, Bazaar only).
+                    Git, Mercurial, Bazaar only). Note that if you wish to build
+                    a fixed revision and you wish to avoid performing a query on
+                    the remote repository every time BitBake parses your recipe,
+                    you should specify a SRCREV that is a full revision identifier
+                    (and not just a tag).
                 </para>
             </glossdef>
         </glossentry>
-- 
1.7.4.1