Add hardware API libs and SSL engines to gdb path

Hardware API implementations and SSL engines are stored as a
subdirectory to the /system/lib directory. This makes it easier to debug
them with the "gdbclient" command.

Change-Id: If7c3c7ffbca87425aac85d527e44fbea3bb025ad
diff --git a/envsetup.sh b/envsetup.sh
index f11763a..b7ca7d2 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -757,7 +757,7 @@
        fi
 
        echo >|"$OUT_ROOT/gdbclient.cmds" "set solib-absolute-prefix $OUT_SYMBOLS"
-       echo >>"$OUT_ROOT/gdbclient.cmds" "set solib-search-path $OUT_SO_SYMBOLS"
+       echo >>"$OUT_ROOT/gdbclient.cmds" "set solib-search-path $OUT_SO_SYMBOLS:$OUT_SO_SYMBOLS/hw:$OUT_SO_SYMBOLS/ssl/engines"
        echo >>"$OUT_ROOT/gdbclient.cmds" "target remote $PORT"
        echo >>"$OUT_ROOT/gdbclient.cmds" ""