Update git submodules

* Update docs/submodules/sdc.git from branch 'elalto'
  to 45d2007325a88df08102cf842c8a518fe0dd4f70
  - Release elalto
    
    Release el Alto 1.5.3
    
    Issue-ID: SDC-3162
    Signed-off-by: sebdet <sebastien.determe@intl.att.com>
    Change-Id: I9c709af4be13c91be72528394fbf8bf61a9a1fcf
    
diff --git a/docs/submodules/sdc.git b/docs/submodules/sdc.git
index 09fb659..45d2007 160000
--- a/docs/submodules/sdc.git
+++ b/docs/submodules/sdc.git
@@ -1 +1 @@
-Subproject commit 09fb659de8b346fdb2b3a894b39319e445145f43
+Subproject commit 45d2007325a88df08102cf842c8a518fe0dd4f70