oe-time-dd-test.sh: increase timeout to 15 sec

With the previous timeout of 5 seconds, there would be
builds such as:
   https://autobuilder.yocto.io/pub/non-release/20210417-13/
which produced 17 files with top output with top running 454 times
and that's a bit too much data to analyze for each run. By
increasing the timeout, we'll find the worse problems
first, fix them and then we can decrease the timeout if needed.

(From OE-Core rev: 92b29a09b4c442597d212337b785afb76129ac7c)

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/oe-time-dd-test.sh

@@ -13,7 +13,7 @@ usage() {
         echo "Usage: $0 <count>"
 }
 
-TIMEOUT=5
+TIMEOUT=15
 
 if [ $# -ne 1 ]; then
         usage