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
    
1 file changed