meson: fix "static build" entry in summary

Fixes: a0cbd2e ("meson: use prefer_static option", 2023-05-18)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

meson.build

@@ -4088,7 +4088,7 @@ summary_info += {'QEMU_LDFLAGS':      ' '.join(qemu_ldflags)}
 summary_info += {'profiler':          get_option('profiler')}
 summary_info += {'link-time optimization (LTO)': get_option('b_lto')}
 summary_info += {'PIE':               get_option('b_pie')}
-summary_info += {'static build':      config_host.has_key('CONFIG_STATIC')}
+summary_info += {'static build':      get_option('prefer_static')}
 summary_info += {'malloc trim support': has_malloc_trim}
 summary_info += {'membarrier':        have_membarrier}
 summary_info += {'debug graph lock':  get_option('debug_graph_lock')}