qt module: correctly compare program name for lrelease version

(b, name) will always have the canonical tool name, not just a
potentially weird bin path. We need to check stderr for qt4 tools other
than lrelease, but we keyed off of the tool bin path, so matches were by
no means guaranteed, and specifically, would fail if the tool is looked
up via bindir.

This really should always have checked the canonical name, which is
guaranteed to be correct.

Partial fix for #10443

mesonbuild/modules/qt.py

@@ -154,7 +154,7 @@ class QtBaseModule(ExtensionModule):
             # Ensure that the version of qt and each tool are the same
             def get_version(p: ExternalProgram) -> str:
                 _, out, err = Popen_safe(p.get_command() + arg)
-                if b.startswith('lrelease') or not qt_dep.version.startswith('4'):
+                if name == 'lrelease' or not qt_dep.version.startswith('4'):
                     care = out
                 else:
                     care = err