[dotest] Fix compiler version number comparison

[friss]

Summary

dotest's version comparision function is just a lexicographical compare
of the version strings. This is obviously wrong. This patch implements
a numerical comparision of the individual version components instead.

Python is not my language of choice, please suggest a better implementation!

[friss]

Use LooseVersion as suggested by Zachary

lldb/trunk/packages/Python/lldbsuite/test/lldbtest.py

 """
 
 from __future__ import absolute_import
 from __future__ import print_function
 
 # System modules
 import abc
 import collections
+from distutils.version import LooseVersion
 from functools import wraps
 import gc
 import glob
 import inspect
 import io
 import os.path
 import re
 import shutil
def expectedCompilerVersion(self, compiler_version):
         if (compiler_version is None):
             return True
         operator = str(compiler_version[0])
         version = compiler_version[1]
 
         if (version is None):
             return True
         if (operator == '>'):
-            return self.getCompilerVersion() > version
+            return LooseVersion(self.getCompilerVersion()) > LooseVersion(version)
         if (operator == '>=' or operator == '=>'):
-            return self.getCompilerVersion() >= version
+            return LooseVersion(self.getCompilerVersion()) >= LooseVersion(version)
         if (operator == '<'):
-            return self.getCompilerVersion() < version
+            return LooseVersion(self.getCompilerVersion()) < LooseVersion(version)
         if (operator == '<=' or operator == '=<'):
-            return self.getCompilerVersion() <= version
+            return LooseVersion(self.getCompilerVersion()) <= LooseVersion(version)
         if (operator == '!=' or operator == '!' or operator == 'not'):
             return str(version) not in str(self.getCompilerVersion())
         return str(version) in str(self.getCompilerVersion())
 
     def expectedCompiler(self, compilers):
         """Returns True iff any element of compilers is a sub-string of the current compiler."""
         if (compilers is None):
             return True