build: fix vendor symbols in gdb

Set TARGET_OUT_VENDOR_SHARED_LIBRARIES_UNSTRIPPED
Append '64' for 64-bit libraries

Change-Id: Ief289bb23950d4bed84cf616cff6038fbd8caf95
diff --git a/envsetup.sh b/envsetup.sh
index 665c8f3..8c96e00 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -1062,6 +1062,7 @@
        fi
 
        OUT_SO_SYMBOLS=$OUT_SO_SYMBOLS$USE64BIT
+       OUT_VENDOR_SO_SYMBOLS=$OUT_VENDOR_SO_SYMBOLS$USE64BIT
 
        echo >|"$OUT_ROOT/gdbclient.cmds" "set solib-absolute-prefix $OUT_SYMBOLS"
        echo >>"$OUT_ROOT/gdbclient.cmds" "set solib-search-path $OUT_SO_SYMBOLS:$OUT_SO_SYMBOLS/hw:$OUT_SO_SYMBOLS/ssl/engines:$OUT_SO_SYMBOLS/drm:$OUT_SO_SYMBOLS/egl:$OUT_SO_SYMBOLS/soundfx:$OUT_VENDOR_SO_SYMBOLS:$OUT_VENDOR_SO_SYMBOLS/hw:$OUT_VENDOR_SO_SYMBOLS/egl"