Add --curses shortcut for specifying the curses-based test results formatter.

This commit closes the following review:
http://reviews.llvm.org/D14488

llvm-svn: 252498
diff --git a/lldb/packages/Python/lldbsuite/test/dosep.py b/lldb/packages/Python/lldbsuite/test/dosep.py
index 5bc966d..f3fd3ea 100644
--- a/lldb/packages/Python/lldbsuite/test/dosep.py
+++ b/lldb/packages/Python/lldbsuite/test/dosep.py
@@ -1227,6 +1227,10 @@
         _remove_option(dotest_argv, "--results-formatter-option", "-O",
                        True)
 
+    # Remove the --curses shortcut if specified.
+    if dotest_options.curses:
+        _remove_option(dotest_argv, "--curses", None, False)
+
     # Remove test runner name if present.
     if dotest_options.test_runner_name is not None:
         _remove_option(dotest_argv, "--test-runner-name", None, True)