subprojects: Ignore .wraplock file generated by meson v1.9.0

The .wraplock file is automatically generated by meson v1.9.0 (the
related issue: https://github.com/mesonbuild/meson/issues/14948).

Ignore it for now.

Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20250920160520.3699591-3-zhao1.liu@intel.com

subprojects/.gitignore

@@ -21,3 +21,6 @@
 /quote-1.0.36
 /syn-2.0.66
 /unicode-ident-1.0.12
+
+# Workaround for Meson v1.9.0 https://github.com/mesonbuild/meson/issues/14948
+/.wraplock