[crashlog] Strip trailing `\n` from check_output return.

Generally having spurious `\n` doesn't matter, but here the
returning string is a command which is executed, so  we want
to strip it. Pointed out by Jason.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@358717 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/examples/python/crashlog.py b/examples/python/crashlog.py
index e006ada..033be8c 100755
--- a/examples/python/crashlog.py
+++ b/examples/python/crashlog.py
@@ -225,7 +225,7 @@
         if not os.path.exists(dsymForUUIDBinary):
             try:
                 dsymForUUIDBinary = subprocess.check_output('which dsymForUUID',
-                                                            shell=True)
+                                                            shell=True).rstrip('\n')
             except:
                 dsymForUUIDBinary = ""