qemuimage-testlib: Increase qemu startup timeouts

We are seeing timeouts on the autobuilder where qemu does start but the script
doesn't appear to be able to detect it in time. This patch increases the
timeouts since there seems little harm in doing so.

(From OE-Core rev: 53071c6b569067f98c558ee667bb1a4be0d8f6db)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/qemuimage-testlib

@@ -418,7 +418,7 @@ Test_Create_Qemu()
 		sleep 5
 	fi
 
-	while [ ${up_time} -lt 10 ]
+	while [ ${up_time} -lt 30 ]
 	do
 		QEMUPID=`qemuimage-testlib-pythonhelper --findqemu $XTERMPID 2>/dev/null`
 		if [ $? -ne 0 ]; then
@@ -432,7 +432,7 @@ Test_Create_Qemu()
 		fi
 	done
 
-	if [ ${up_time} == 10 ]; then
+	if [ ${up_time} == 30 ]; then
 		Test_Info "No qemu process appeared to start, exiting"
 		ps axww -O ppid
 		Test_Info "Process list dumped for debugging purposes"
@@ -442,6 +442,7 @@ Test_Create_Qemu()
 		return 1
 	fi
 
+	up_time=0
 	# Parse IP address of target from the qemu command line
 	TARGET_IPADDR=`Test_Fetch_Target_IP $QEMUPID`
 	echo "Target IP is ${TARGET_IPADDR}"