Avoid octal escape sequence warning with MSVC. Patch from STL@microsoft.com

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@272639 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/re/re.regex/re.regex.construct/awk_oct.pass.cpp

@@ -25,5 +25,5 @@ int main()
     assert(std::regex_match("\4", std::regex("\\4", awk)));
     assert(std::regex_match("\41", std::regex("\\41", awk)));
     assert(std::regex_match("\141", std::regex("\\141", awk)));
-    assert(std::regex_match("\1411", std::regex("\\1411", awk)));
+    assert(std::regex_match("\141" "1", std::regex("\\1411", awk)));
 }

test/std/re/re.submatch/re.submatch.op/compare.pass.cpp

@@ -283,6 +283,6 @@ int main()
     test(std::string("1234"), std::string("123"));
     test(std::wstring(L"123"), std::wstring(L"123"));
     test(std::wstring(L"1234"), std::wstring(L"123"));
-    test(std::string("123\00056", 6), std::string("123\00056", 6), false);
-    test(std::wstring(L"123\00056", 6), std::wstring(L"123\00056", 6), false);
+    test(std::string("123\000" "56", 6), std::string("123\000" "56", 6), false);
+    test(std::wstring(L"123\000" L"56", 6), std::wstring(L"123\000" L"56", 6), false);
 }