daemon-utils: remove usage of here-docs

In some versions of bash, here-docs and here-strings use temporary
files, which means daemon-util needs a writable temporary filesystem.
Since echo is a bash builtin anyway, it's simple to switch to it and
remove this dependency.

Signed-off-by: Iustin Pop <iustin@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>

daemons/daemon-util.in

@@ -59,7 +59,7 @@ start() {
   local name="$1"; shift
 
   # Convert daemon name to uppercase after removing "ganeti-" prefix
-  local ucname=$(tr a-z A-Z <<< ${name#ganeti-})
+  local ucname=$(echo ${name#ganeti-} | tr a-z A-Z)
 
   # Read $<daemon>_ARGS and $EXTRA_<daemon>_ARGS
   eval local args="\"\$${ucname}_ARGS \$EXTRA_${ucname}_ARGS\""