fix missing utilities in Windows wheels

Some utilities, like `rcc.exe`, were getting filtered-out: handle
the fact that those are "not a Qt executable", as reported by
`windeployqt`, but we still want to include them.

build.py

@@ -714,10 +714,13 @@ def report_and_check_call(command, *args, cwd=None, shell=False, **kwargs):
         for arg in command:
             print('    {}'.format(repr(arg)))
 
+    if 'check' not in kwargs:
+        kwargs['check'] = True
+
     sys.stdout.flush()
     if cwd is not None:
         cwd = fspath(cwd)
-    return subprocess.run(command, *args, cwd=cwd, check=True, **kwargs)
+    return subprocess.run(command, *args, cwd=cwd, **kwargs)
 
 
 @attr.s(frozen=True)
@@ -1185,20 +1188,28 @@ def windeployqt_list_source(
         target: pathlib.Path,
         windeployqt: pathlib.Path,
 ) -> typing.Iterable[pathlib.Path]:
-    try:
-        process = report_and_check_call(
-            command=[
-                windeployqt,
-                '--dry-run',
-                '--list', 'source',
-                target,
-            ],
-            stdout=subprocess.PIPE,
-            # ugh, 3.5
-            # encoding='utf-8',
-        )
-    except subprocess.CalledProcessError as e:
-        raise DependencyCollectionError(target) from e
+    process = report_and_check_call(
+        command=[
+            windeployqt,
+            '--dry-run',
+            '--list', 'source',
+            target,
+        ],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        # ugh, 3.5
+        # encoding='utf-8',
+        check=False,
+    )
+
+    if process.returncode:
+        if (process.returncode > 0 and
+            'does not seem to be a Qt executable'
+            in process.stderr.decode('utf-8')):
+            # This can happen with some utilities like
+            # `rcc.exe`, which we still want to include.
+            return []
+        raise DependencyCollectionError(target, process)
 
     paths = [
         pathlib.Path(line)