Do not hide android emulator output

It might print useful messages, even though they might come mixed with
other test messages.

However we can't leave stdout/stderr as is, because Coin agent hangs at
the end of the shell script, waiting for them to close. So we just
redirect them to a file.

Pick-to: 6.3 6.2
Change-Id: I797af78786b7df31131b3c3261e1c1fc00e5d460
Reviewed-by: Daniel Smith <Daniel.Smith@qt.io>

util/android/android_emulator_launcher.sh

@@ -66,7 +66,10 @@ for counter in `seq 1 ${EMULATOR_MAX_RETRIES}`; do
     fi
 
     echo "Starting emulator, try ${counter}/${EMULATOR_MAX_RETRIES}"
-    $EMULATOR_EXEC $EMULATOR_NAME -gpu swiftshader_indirect -no-audio -partition-size 4096 -cores 4 -memory 3500 -no-snapshot-load -no-snapshot-save &>/dev/null &
+    $EMULATOR_EXEC $EMULATOR_NAME  \
+        -gpu swiftshader_indirect -no-audio -partition-size 4096  \
+        -cores 4 -memory 3500 -no-snapshot-load -no-snapshot-save \
+        >$HOME/emulator.log 2>&1  &
     emulator_pid=$!
 
     $ADB_EXEC wait-for-device