Add patch file for gtest so it works with HIP compiler in C++20 mode

See report here: google/googletest#3659

scripts/snl/gtest-hip-patch

@@ -0,0 +1,102 @@
+diff --git a/googletest/include/gtest/gtest-printers.h b/googletest/include/gtest/gtest-printers.h
+index 7d7e77c1..025ed642 100644
+--- a/googletest/include/gtest/gtest-printers.h
++++ b/googletest/include/gtest/gtest-printers.h
+@@ -473,7 +473,7 @@ GTEST_API_ void PrintTo(char32_t c, ::std::ostream* os);
+ inline void PrintTo(char16_t c, ::std::ostream* os) {
+   PrintTo(ImplicitCast_<char32_t>(c), os);
+ }
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ inline void PrintTo(char8_t c, ::std::ostream* os) {
+   PrintTo(ImplicitCast_<char32_t>(c), os);
+ }
+@@ -586,7 +586,7 @@ inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
+ inline void PrintTo(unsigned char* s, ::std::ostream* os) {
+   PrintTo(ImplicitCast_<const void*>(s), os);
+ }
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ // Overloads for u8 strings.
+ GTEST_API_ void PrintTo(const char8_t* s, ::std::ostream* os);
+ inline void PrintTo(char8_t* s, ::std::ostream* os) {
+@@ -906,7 +906,7 @@ void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
+ GTEST_API_ void UniversalPrintArray(const char* begin, size_t len,
+                                     ::std::ostream* os);
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ // This overload prints a (const) char8_t array compactly.
+ GTEST_API_ void UniversalPrintArray(const char8_t* begin, size_t len,
+                                     ::std::ostream* os);
+@@ -1002,7 +1002,7 @@ template <>
+ class UniversalTersePrinter<char*> : public UniversalTersePrinter<const char*> {
+ };
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ template <>
+ class UniversalTersePrinter<const char8_t*> {
+  public:
+diff --git a/googletest/include/gtest/internal/gtest-port.h b/googletest/include/gtest/internal/gtest-port.h
+index b4fa3f07..594a038c 100644
+--- a/googletest/include/gtest/internal/gtest-port.h
++++ b/googletest/include/gtest/internal/gtest-port.h
+@@ -1939,7 +1939,7 @@ inline bool IsUpper(char ch) {
+ inline bool IsXDigit(char ch) {
+   return isxdigit(static_cast<unsigned char>(ch)) != 0;
+ }
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ inline bool IsXDigit(char8_t ch) {
+   return isxdigit(static_cast<unsigned char>(ch)) != 0;
+ }
+diff --git a/googletest/src/gtest-printers.cc b/googletest/src/gtest-printers.cc
+index d475ad36..7ccd181d 100644
+--- a/googletest/src/gtest-printers.cc
++++ b/googletest/src/gtest-printers.cc
+@@ -214,7 +214,7 @@ static const char* GetCharWidthPrefix(signed char) { return ""; }
+
+ static const char* GetCharWidthPrefix(unsigned char) { return ""; }
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ static const char* GetCharWidthPrefix(char8_t) { return "u8"; }
+ #endif
+
+@@ -230,7 +230,7 @@ static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
+   return PrintAsStringLiteralTo(ToChar32(c), os);
+ }
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ static CharFormat PrintAsStringLiteralTo(char8_t c, ostream* os) {
+   return PrintAsStringLiteralTo(ToChar32(c), os);
+ }
+@@ -393,7 +393,7 @@ void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
+   UniversalPrintCharArray(begin, len, os);
+ }
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ // Prints a (const) char8_t array of 'len' elements, starting at address
+ // 'begin'.
+ void UniversalPrintArray(const char8_t* begin, size_t len, ostream* os) {
+@@ -436,7 +436,7 @@ void PrintCStringTo(const Char* s, ostream* os) {
+
+ void PrintTo(const char* s, ostream* os) { PrintCStringTo(s, os); }
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ void PrintTo(const char8_t* s, ostream* os) { PrintCStringTo(s, os); }
+ #endif
+
+@@ -528,7 +528,7 @@ void PrintStringTo(const ::std::string& s, ostream* os) {
+   }
+ }
+
+-#ifdef __cpp_char8_t
++#ifdef __cpp_lib_char8_t
+ void PrintU8StringTo(const ::std::u8string& s, ostream* os) {
+   PrintCharsAsStringTo(s.data(), s.size(), os);
+ }