Added -j option to dpkg-buildpackage to speed up build

debian/autobake-deb.sh

@@ -160,7 +160,7 @@ fi
 # Build the package
 # Pass -I so that .git and other unnecessary temporary and source control files
 # will be ignored by dpkg-source when creating the tar.gz source package.
-fakeroot dpkg-buildpackage -us -uc -I $BUILDPACKAGE_FLAGS
+fakeroot dpkg-buildpackage -us -uc -I $BUILDPACKAGE_FLAGS -j$(nproc)
 
 # If the step above fails due to missing dependencies, you can manually run
 #   sudo mk-build-deps debian/control -r -i