[dotest] --skip-category should append and not override.

<rdar://problem/38566150>

llvm-svn: 329358

diff --git a/lldb/packages/Python/lldbsuite/test/dotest.py b/lldb/packages/Python/lldbsuite/test/dotest.py
index 41a15eb..6fa85cb 100644 (file)
--- a/lldb/packages/Python/lldbsuite/test/dotest.py
+++ b/lldb/packages/Python/lldbsuite/test/dotest.py
@@ -337,7 +337,7 @@ def parseOptionsAndInitTestdirs():
         configuration.categoriesList = []
 
     if args.skipCategories:
-        configuration.skipCategories = test_categories.validate(
+        configuration.skipCategories += test_categories.validate(
             args.skipCategories, False)
 
     if args.E: