gn build: Merge r367393

llvm-svn: 367422

Author: nico

llvm/utils/gn/secondary/llvm/unittests/Support/BUILD.gn

@@ -8,6 +8,7 @@ unittest("SupportTests") {
   sources = [
     "ARMAttributeParser.cpp",
     "AlignOfTest.cpp",
+    "AlignmentTest.cpp",
     "AllocatorTest.cpp",
     "AnnotationsTest.cpp",
     "ArrayRecyclerTest.cpp",