Bump Sphinx version to 1.5.6

1.5.6 allows:
intersphinx link using the ':doc:' directive.

And does not have the memory leak that was causing our build
to fail found in sphinx-build 1.6 onwards

Change-Id: I1a04871b2771a0123096629d706a6b2d375f520e
Signed-off-by: Aric Gardner <agardner@linuxfoundation.org>

diff --git a/etc/requirements.txt b/etc/requirements.txt
index 7550086..734f07f 100644 (file)
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -1,5 +1,5 @@
 tox
-Sphinx==1.3.1
+Sphinx==1.5.6
 doc8
 docutils==0.12
 setuptools