Merge pull request travitch#100 from lzto/master

support -gdwarf-4 flag

Author: ianamason

wllvm/arglistfilter.py

@@ -153,6 +153,7 @@ def __init__(self, inputList, exactMatches={}, patternMatches={}):
             '-ggdb3' : (0, ArgumentListFilter.compileUnaryCallback),
             '-gdwarf-2' : (0, ArgumentListFilter.compileUnaryCallback),
             '-gdwarf-3' : (0, ArgumentListFilter.compileUnaryCallback),
+            '-gdwarf-4' : (0, ArgumentListFilter.compileUnaryCallback),
             '-gline-tables-only' : (0, ArgumentListFilter.compileUnaryCallback),
             '-grecord-gcc-switches': (0, ArgumentListFilter.compileUnaryCallback),