Update git submodules

* Update docs/submodules/qtip from branch 'master'
  - Merge "Add API docs"
  - Add API docs

      - Add developer guide for API
      - Add user guide for API
      - Add api to user guide doctree

    JIRA: QTIP-234

    Change-Id: Id388f82c52e31b3c75599ab846e64431be8083b7
    Signed-off-by: akhilbatra898 <akhil.batra@research.iiit.ac.in>

diff --git a/docs/submodules/qtip b/docs/submodules/qtip
index e1797ec..9e84ca2 160000 (submodule)
--- a/docs/submodules/qtip
+++ b/docs/submodules/qtip
@@ -1 +1 @@
-Subproject commit e1797ecb6ce4c2891204b8902079072734571122
+Subproject commit 9e84ca23fcd654ecb9b9bd09e14b84b6c06728f4