od: fix buglet in --traditional, microoptimization,

document coreutils bug
bloat-o-meter: account for objects in rodata too

scripts/bloat-o-meter

@@ -17,7 +17,7 @@ def getsizes(file):
     sym = {}
     for l in os.popen("nm --size-sort " + file).readlines():
         size, type, name = l[:-1].split()
-        if type in "tTdDbB":
+        if type in "tTdDbBrR":
             if "." in name: name = "static." + name.split(".")[0]
             sym[name] = sym.get(name, 0) + int(size, 16)
     for l in os.popen("readelf -S " + file).readlines():