build: ignore python utf-8 parsing errors when finding vs lastest dir

Change-Id: Ia03ace8826ac44820c621c9ff2ee1a99b26bbf1b

MSVC/winmake.py

@@ -81,7 +81,7 @@ def findVSLatestDir():
         '-property installationPath'
     ]
     cmd = [vs_where_path] + args
-    output = subprocess.check_output(' '.join(cmd)).decode('utf-8')
+    output = subprocess.check_output(' '.join(cmd)).decode('utf-8', errors='ignore')
     if output:
         return output.splitlines()[0]
     else: