Regression test for NDK bug 80199.

Bionic never had this bug, but since the proposed fix is to remove the NDK's
broken code, we should add a regression test here.

Bug: https://code.google.com/p/android/issues/detail?id=80199
Change-Id: I4de21b5da9913cef990bc4d05a7e27562a71a02b
diff --git a/tests/wchar_test.cpp b/tests/wchar_test.cpp
index 63f3760..a1d1501 100644
--- a/tests/wchar_test.cpp
+++ b/tests/wchar_test.cpp
@@ -234,6 +234,11 @@
   ASSERT_EQ(NULL, wcsstr(haystack, bad_needle));
 }
 
+TEST(wchar, wcsstr_80199) {
+  // https://code.google.com/p/android/issues/detail?id=80199
+  ASSERT_TRUE(wcsstr(L"romrom", L"rom") != NULL);
+}
+
 TEST(wchar, mbtowc) {
   wchar_t out[8];