debuild: Fix the nw.js sources for the arm64 architecture.

6 jobs for arm64-debian-build-fixes in 107 minutes and 8 seconds (queued for 204 minutes and 36 seconds)
Name Stage Failure
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raspbian_stretch_armv7l_deb Test There has been a timeout failure or the job got stuck. Check your timeout limits or try again
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windows_i386_innosetup Test There has been a timeout failure or the job got stuck. Check your timeout limits or try again
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