Fix build_data functionality with python 3

tools/build_api.py

@@ -1356,4 +1356,4 @@ def merge_build_data(filename, toolchain_report, app_type):
                     if 'type' not in build[0]:
                         build[0]['type'] = app_type
                     build_data['builds'].append(build[0])
-    dump(build_data, open(filename, "wb"), indent=4, separators=(',', ': '))
+    dump(build_data, open(filename, "w"), indent=4, separators=(',', ': '))

tools/test.py

@@ -220,6 +220,9 @@
                 # NotSupportedException is handled by the build log
                 pass
             except Exception as e:
+                if options.verbose:
+                    import traceback
+                    traceback.print_exc()
                 # Some other exception occurred, print the error message
                 print(e)
 

tools/toolchains/__init__.py

@@ -321,7 +321,7 @@ def make_option_file(self, options, naming=".options_{}.txt"):
         except IOError:
             old_md5 = None
         if old_md5 != new_md5:
-            with open(via_file, "w") as fd:
+            with open(via_file, "wb") as fd:
                 fd.write(to_write)
         return via_file