linux: compiler_version.py tweak to work on gcc 4.4

build/compiler_version.py

Index: build/compiler_version.py
diff --git a/build/compiler_version.py b/build/compiler_version.py
index 5eb467c781d37e2b96e2b10ca5ede11d358d1af4..69f0a50be0b298c5b02f34d6571c4a99aff6dbf5 100755
--- a/build/compiler_version.py
+++ b/build/compiler_version.py
@@ -21,7 +21,7 @@ def GetVersion(compiler):
     compiler = compiler + " -dumpversion"
     pipe = subprocess.Popen(compiler, stdout=subprocess.PIPE, shell=True)
     gcc_output = pipe.communicate()[0]
-    result = re.match(r"(\d+)\.(\d+)\..*", gcc_output)
+    result = re.match(r"(\d+)\.(\d+)", gcc_output)
     return result.group(1) + result.group(2)
   except Exception, e:
     print >> sys.stderr, "compiler_version.py failed to execute:", compiler