[build] Add "release" dir creation in create_binary_release.sh

This fixes "releasing/release: Not a directory" problem during releasing.

Author: wuchong

tools/releasing/create_binary_release.sh

@@ -49,6 +49,7 @@ cd ..
 
 FLUSS_DIR=`pwd`
 RELEASE_DIR=${FLUSS_DIR}/tools/releasing/release
+mkdir -p ${RELEASE_DIR}
 
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