Import LinuxCNC source tree

tests/interp/g72-missing-iteration/test.sh

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+#!/bin/bash
+#
+# Demonstrate G71 problem reported in
+# https://github.com/LinuxCNC/linuxcnc/issues/707.  When Z limit is
+# 39.999, everything work, when it is 40, the facing is done without
+# iterations.
+
+rs274 -g g72-iterations-missing.ngc | awk '{$1=""; print}' > result &
+pid=$!
+
+# Give it 10 seconds to complete
+count=10
+while [ 0 -lt $count ] && kill -0 $pid > /dev/null 2>&1 ; do
+    sleep 1
+    count=$((count - 1))
+done
+
+if kill -0 $pid > /dev/null 2>&1; then
+    kill -9 $pid
+    echo "E: g71-iterations-missing.ngc program seem to be stuck, killing"
+    exit 1
+fi
+
+exit 0