* tools/dist/dist.sh: Fix typo in comment.
#
# USAGE: ./dist.sh -v VERSION -r REVISION -pr REPOS-PATH
-# [-alpha ALPHA_NUM|-beta BETA_NUM|-rc RC_NUM|pre PRE_NUM]
+# [-alpha ALPHA_NUM|-beta BETA_NUM|-rc RC_NUM|-pre PRE_NUM]
# [-apr PATH-TO-APR ] [-apru PATH-TO-APR-UTIL]
# [-apri PATH-TO-APR-ICONV] [-neon PATH-TO-NEON]
# [-serf PATH-TO-SERF] [-zlib PATH-TO-ZLIB]
