gtkdochelper.py: Ignore UnicodeEncodeError when printing output

Windows cmd.exe consoles may be using a code page that might choke
print() when we are outputting the output from calling gtk-doc.  Let's
just ignore the error when it happens and print as much as we could in
this situation.

mesonbuild/scripts/gtkdochelper.py

@@ -74,7 +74,14 @@ def gtkdoc_run_check(cmd, cwd, library_paths=None):
             err_msg.append(out)
         raise MesonException('\n'.join(err_msg))
     elif out:
+        # Unfortunately Windows cmd.exe consoles may be using a codepage
+        # that might choke print() with a UnicodeEncodeError, so let's
+        # ignore such errors for now, as a compromise as we are outputting
+        # console output here...
+        try:
             print(out)
+        except UnicodeEncodeError:
+            pass
 
 def build_gtkdoc(source_root, build_root, doc_subdir, src_subdirs,
                  main_file, module, module_version,