gui-apps/swayosd: ignore CFLAGS for rust binaries

Closes: https://bugs.gentoo.org/945176
Signed-off-by: Julien Roy <julien@jroy.ca>

gui-apps/swayosd/swayosd-0.1.0.ebuild

@@ -261,6 +261,9 @@ BDEPEND="
 	dev-lang/sassc
 "
 
+# Rust
+QA_FLAGS_IGNORED="usr/bin/${PN}-{client,libinput-backend,server}"
+
 src_unpack() {
 	default
 	cargo_src_unpack