zenfone8: drop prebuilt libnbaio_mono

fix this linking error

E vndksupport: Could not load /vendor/lib/hw/audio.r_submix.default.so from default namespace: dlopen failed: cannot locate symbol "_ZN16audio_utils_fifoC1EjjPvb" referenced by "/vendor/lib/libnbaio_mono.so"....

Change-Id: I0e9cad26fb60bbfcaa04aab30a7f34a54c06b0b2
diff --git a/regen-vendor.sh b/regen-vendor.sh
index a3ddd8e..dcd024e 100755
--- a/regen-vendor.sh
+++ b/regen-vendor.sh
@@ -206,6 +206,8 @@
     "lib/libeffectsconfig.so"
     "lib64/libeffects.so"
     "lib64/libeffectsconfig.so"
+    "lib/libnbaio_mono.so"
+    "lib64/libnbaio_mono.so"
 
     # Binary
     "bin/acpi"