Upload: add wait for serial scripts

tools/linux/wait_for_serial

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+echo -n Waiting for $1 serial...
+
+COUNTER=0
+while [ ! -c $1 ] && ((COUNTER++ < 40)); do
+    sleep 0.1
+done
+
+echo Done

tools/linux64/wait_for_serial

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+echo -n Waiting for $1 serial...
+
+COUNTER=0
+while [ ! -c $1 ] && ((COUNTER++ < 40)); do
+    sleep 0.1
+done
+
+echo Done

tools/macosx/wait_for_serial

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+echo -n Waiting for $1 serial...
+
+COUNTER=0
+while [ ! -c $1 ] && ((COUNTER++ < 40)); do
+    sleep 0.1
+done
+
+echo Done

tools/win/wait_for_serial.bat

@@ -0,0 +1,11 @@
+echo Waiting for %1 serial...
+
+for /l %%x in (1, 1, 40) do (
+  ping -w 100 -n 1 127.0.0.1 > nul
+  mode %1 > nul
+  if ERRORLEVEL 0 goto comPortFound
+)
+
+echo timeout waiting for %1 serial
+
+:comPortFound