Fix webidl binder regression + add test_w* testing (emscripten-core#5712

)

* fix webidl binder, it is called by itself and so needs the new 2/3-compatible import method for the shared module

* add testing for w* tests

.travis.yml

@@ -17,6 +17,7 @@ env:
 - TEST_TARGET=asm2i.test_p*
 - TEST_TARGET="asm3.test_p*"
 - TEST_TARGET="ALL.test_q* ALL.test_r* ALL.test_s*"
+- TEST_TARGET="ALL.test_w*"
 - TEST_TARGET="ALL.test_t* ALL.test_u* ALL.test_v* ALL.test_x* ALL.test_y* ALL.test_z*"
 - TEST_TARGET=other
 

tools/webidl_binder.py

@@ -8,7 +8,9 @@
 from __future__ import print_function
 import os, sys
 
-from . import shared
+sys.path.insert(1, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from tools import shared
 
 sys.path.append(shared.path_from_root('third_party'))
 sys.path.append(shared.path_from_root('third_party', 'ply'))