scripts/bloat-o-meter: filter out vermagic as it is not relevant

Seeing it as a false positive increase at the top is just noise:

   linux-head$./scripts/bloat-o-meter ../pre/vmlinux ../post/vmlinux
   add/remove: 0/571 grow/shrink: 1/9 up/down: 20/-64662 (-64642)
   Function                                     old     new   delta
   vermagic                                      49      69     +20

Since it really doesn't "grow", it makes sense to filter it out.

Link: https://lkml.kernel.org/r/20220428035824.7934-1-paul.gortmaker@windriver.com
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

scripts/bloat-o-meter

@@ -36,6 +36,7 @@ def getsizes(file, format):
                 if name.startswith("__se_compat_sys"): continue
                 if name.startswith("__addressable_"): continue
                 if name == "linux_banner": continue
+                if name == "vermagic": continue
                 # statics and some other optimizations adds random .NUMBER
                 name = re_NUMBER.sub('', name)
                 sym[name] = sym.get(name, 0) + int(size, 16)