build(debian): remove LINGLONG_EXPORT_PATH from build options

[dengbo11]

Removes the -DLINGLONG_EXPORT_PATH=apps/share CMake option from the Debian packaging rules. This path configuration is now handled by the build system defaults.

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Additional details and impacted files

@@                Coverage Diff                @@
##             release/20/1.10    #149   +/-   ##
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  Coverage                   ?   7.17%           
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  Files                      ?      94           
  Lines                      ?   12689           
  Branches                   ?    5936           
=================================================
  Hits                       ?     911           
  Misses                     ?   11397           
  Partials                   ?     381           

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: myml
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