patch 8.2.4421: some installed files and directories have wrong permissions

Problem:    Some installed files and directories have wrong permissions.
Solution:   Adjust the Makefile and shell to set permissions. (closes #9793)
diff --git a/src/installman.sh b/src/installman.sh
index 00a33a2..98bbb28 100755
--- a/src/installman.sh
+++ b/src/installman.sh
@@ -40,6 +40,7 @@
    if test ! -d $destdir; then
       echo creating $destdir
       /bin/sh install-sh -c -d $destdir
+      chmod 755 $destdir
    fi
 fi