py: Print tag/version/git describe in uPy banner.
diff --git a/py/py-version.sh b/py/py-version.sh
index f574b57..5306338 100755
--- a/py/py-version.sh
+++ b/py/py-version.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
 
+git_tag="$(git describe || echo unknown)"
 git_hash="$(git rev-parse --short HEAD 2> /dev/null || echo unknown)"
 git_files_are_clean=1
 # Check if there are any modified files.
@@ -11,6 +12,7 @@
 fi
 cat <<EOF
 // This file was generated by py/py-version.sh
+#define MICROPY_GIT_TAG "${git_tag}"
 #define MICROPY_GIT_HASH "${git_hash}"
 #define MICROPY_BUILD_DATE "$(date '+%Y-%m-%d')"
 EOF