Address clang-tidy-review comment

Author: mcbarton

lib/Interpreter/CppInterOp.cpp

@@ -2829,6 +2829,7 @@ namespace Cpp {
 
     std::array<char, 256> buffer;
 #if defined(__GNUC__)
+#pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wignored-attributes"
 #endif
     std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
@@ -3444,6 +3445,7 @@ namespace Cpp {
 
   class StreamCaptureInfo {
 #if defined(__GNUC__)
+#pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wignored-attributes"
 #endif
     std::unique_ptr<FILE, decltype(std::fclose)*> m_TempFile;