Add py2exe detection to DiE and YARA rules

Added a header comment to the Py2exe.1.sg rule file for clarity. Introduced a new YARA rule to detect py2exe-packed PE files by checking for the 'PyArg_ParseTuple' export.

db/PE/Py2exe.1.sg

@@ -1,3 +1,5 @@
+// Detect It Easy: detection rule file
+
 meta("packer", "py2exe");
 
 function detect() {

yara_rules/DiE_InterestingThings_by_DosX.yar

@@ -133,6 +133,14 @@ rule Packer__SimplePack {
         )
 }
 
+rule Packer__py2exe {
+    condition:
+        IsPE and
+        IsNative and
+        not IsDll and
+        pe.exports("PyArg_ParseTuple")
+}
+
 rule Protection__obfus_h {
     condition:
         IsPE and