HADOOP-15925. The config and log of gpg-agent are removed in create-release script. Contributed by Dinesh Chitlangia.

(cherry picked from commit af5958f7b6a209d6a6622acee47a66a4a921828d)

dev-support/bin/create-release

@@ -524,7 +524,7 @@ function makearelease
   big_console_header "Cleaning the Source Tree"
 
   # git clean to clear any remnants from previous build
-  run "${GIT}" clean -xdf
+  run "${GIT}" clean -xdf -e /patchprocess
 
   mkdir -p "${LOGDIR}"