docs: fix instructions for debugging

Change-Id: I9095e4b391c6554917348c7b70634a7b42680731
diff --git a/doc/architecture.md b/doc/architecture.md
index 16e0af8..369f9d8 100644
--- a/doc/architecture.md
+++ b/doc/architecture.md
@@ -101,8 +101,9 @@
 user@laptop ~/build/br-cfb $ make cla-sysrepo-reconfigure
 user@laptop ~/build/br-cfb $ scp per-package/cla-sysrepo/target/usr/bin/cla-sysrepod root@10.10.10.228:/tmp/
 user@laptop ~/build/br-cfb $ ssh root@10.10.10.228 gdbserver :33666 /tmp/cla-sysrepod ...some args here...
-user@laptop ~/build/br-cfb $ /host/usr/bin/arm-linux-gnueabihf-gdb -x staging/usr/share/buildroot/gdbinit \
-  per-package/cla-sysrepo/target/usr/bin/cla-sysrepod --ex 'target remote 10.10.10.228:33666' --ex c
+user@laptop ~/build/br-cfb $ ./host/usr/bin/arm-linux-gnueabihf-gdb -x staging/usr/share/buildroot/gdbinit \
+  per-package/cla-sysrepo/target/usr/bin/cla-sysrepod --ex 'set sysroot target/' \
+  --ex 'target remote 10.10.10.228:33666' --ex c
 ```
 
 The core "NETCONF-related" packages are not stripped, so that some debugging should be possible.