Corrected the automatic installation of third-party tool setups and
libraries (for now, specifically the xschem setup and the alphanumeric
layout library), and cleaned up the instructions to make it clear how
to do the installation in the most common case.
diff --git a/scripts/tools.txt b/scripts/tools.txt
index 60e9fe0..648b3dc 100644
--- a/scripts/tools.txt
+++ b/scripts/tools.txt
@@ -4,3 +4,4 @@
 irsim
 openlane
 qflow
+xschem