remove executable property from doc files
diff --git a/Lib/plat-irix5/flp.doc b/Lib/plat-irix5/flp.doc
old mode 100755
new mode 100644
diff --git a/Lib/plat-irix5/readcd.doc b/Lib/plat-irix5/readcd.doc
old mode 100755
new mode 100644