build: move stack protector flag selection to meson

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/meson_options.txt b/meson_options.txt
index cd4a183..972c458 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -91,6 +91,8 @@
        description: 'enable default sanitizers')
 option('tsan', type: 'boolean', value: false,
        description: 'enable thread sanitizer')
+option('stack_protector', type: 'feature', value: 'auto',
+       description: 'compiler-provided stack protection')
 option('cfi', type: 'boolean', value: false,
        description: 'Control-Flow Integrity (CFI)')
 option('cfi_debug', type: 'boolean', value: false,