[dotest] Fix syntax error and typo.

Python uses `elif` rather than `else if`. Fixes r329889.

llvm-svn: 329890
diff --git a/lldb/packages/Python/lldbsuite/test/dotest_args.py b/lldb/packages/Python/lldbsuite/test/dotest_args.py
index e878076..58190d8 100644
--- a/lldb/packages/Python/lldbsuite/test/dotest_args.py
+++ b/lldb/packages/Python/lldbsuite/test/dotest_args.py
@@ -83,7 +83,7 @@
         help=textwrap.dedent('''Specify the extra flags to be passed to the toolchain when building the inferior programs to be debugged
                                                            suggestions: do not lump the "-A arch1 -A arch2" together such that the -E option applies to only one of the architectures'''))
 
-    group.add_argument('--dsymutil', metavar='dsymutil', dest='dsymutil', help=textwrap.dedent('Specify Which dsymutil to use.'))
+    group.add_argument('--dsymutil', metavar='dsymutil', dest='dsymutil', help=textwrap.dedent('Specify which dsymutil to use.'))
 
     # Test filtering options
     group = parser.add_argument_group('Test filtering options')