Make Bundled_code_header visible for hipRTC usage (#1359)

[ROCm/hip commit: 0fd14a3e13]

projects/hip/include/hip/hcc_detail/code_object_bundle.hpp

@@ -91,6 +91,10 @@ struct Bundled_code {
 
 #define magic_string_  "__CLANG_OFFLOAD_BUNDLE__"
 
+#ifdef __GNUC__
+#pragma GCC visibility push (default)
+#endif
+
 class Bundled_code_header {
     // DATA - STATICS
     static constexpr auto magic_string_sz_ = sizeof(magic_string_) - 1;
@@ -172,6 +176,10 @@ class Bundled_code_header {
     size_t bundled_code_size = 0;
 };
 
+#ifdef __GNUC__
+#pragma GCC visibility pop
+#endif
+
 // CREATORS
 template <typename RandomAccessIterator>
 Bundled_code_header::Bundled_code_header(RandomAccessIterator f, RandomAccessIterator l)