eth.attach() doesn`t work with threads without wait time

Revision:
0:074e782ef127
diff -r 000000000000 -r 074e782ef127 .gitignore
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Fri May 25 22:12:13 2018 +0000
@@ -0,0 +1,4 @@
+.build
+.mbed
+projectfiles
+*.py*