Update git submodules

* Update docs/submodules/sdc.git from branch 'master'
  to c8f88d9b496e8f10179bfc26a09a27386d156d47
  - Fix potential NullPointer in SchemaFileImport
    
    While reading the YAML to import, if the content was missing
    the entry node_types it was causing a NullPointerException.
    Also the exception was being suppressed, making very difficult
    to understand what happened.
    
    Change-Id: I44badbee1c739ddf6db08b4e518adb33c430fa84
    Issue-ID: SDC-3070
    Signed-off-by: andre.schmid <andre.schmid@est.tech>
    
1 file changed