os2-buildbot.sh: Use the 64-bit Watcom binaries. GitHub Actions is a 64-bit Ubuntu instance. It was only using the 32-bit binaries because our buildbot put this on the 32-bit Linux host to spread the CPU load around more evenly.
diff --git a/build-scripts/os2-buildbot.sh b/build-scripts/os2-buildbot.sh
index ff4b5f6..abe0350 100755
--- a/build-scripts/os2-buildbot.sh
+++ b/build-scripts/os2-buildbot.sh
@@ -12,7 +12,7 @@ if [ -z "$WATCOM" ]; then
echo "This is often something like '/usr/local/share/watcom'" 1>&2
exit 1
fi
-export PATH="$WATCOM/binl:$PATH"
+export PATH="$WATCOM/binl64:$PATH"
ZIPFILE="$1"
if [ -z $1 ]; then