Add missing changes from ARCH removal.

I somehow didn't upload these fixes from the review. So doing that
now.

Test: Unit tests pass.
Change-Id: Ia17e480eb972db4f7be6947c0e6567632c65431f

scripts/stack

@@ -44,10 +44,7 @@ def main():
 
   args = parser.parse_args()
   if args.arch:
-    if args.arch == "arm" or args.arch == "x86":
-      symbol.ARCH_IS_32BIT = True
-    else:
-      symbol.ARCH_IS_32BIT = False
+    symbol.ARCH_IS_32BIT = not "64" in args.arch
   if args.symbols_dir:
     symbol.SYMBOLS_DIR = args.symbols_dir
   if args.symbols_zip:

scripts/stack_core.py

@@ -584,10 +584,6 @@ class RegisterPatternTests(unittest.TestCase):
     lines = example_crash.split('\n')
     symbol.SetBitness(lines)
     tc.UpdateBitnessRegexes()
-    if symbol.ARCH_IS_32BIT:
-      print("32 Bit Arch")
-    else:
-      print("64 Bit Arch")
     for line in lines:
       tc.ProcessLine(line)
       is_register = (re.search(stupid_pattern, line) is not None)

scripts/symbol.py

@@ -580,7 +580,7 @@ class FormatSymbolWithoutParametersTests(unittest.TestCase):
   def test_nested(self):
     self.assertEqual(FormatSymbolWithoutParameters("foo(int i)::bar(int j)"), "foo::bar")
 
-  def test_unballanced(self):
+  def test_unbalanced(self):
     self.assertEqual(FormatSymbolWithoutParameters("foo(bar(int i)"), "foo(bar(int i)")
     self.assertEqual(FormatSymbolWithoutParameters("foo)bar(int i)"), "foo)bar(int i)")
     self.assertEqual(FormatSymbolWithoutParameters("foo<bar(int i)"), "foo<bar(int i)")