Defer GPU contexts from the C API

Same as how the C++ API does it. Otherwise with on demand mode the
profiler never receives the GPU context info.

public/client/TracyProfiler.cpp

@@ -4258,6 +4258,11 @@ TRACY_API void ___tracy_emit_gpu_new_context( ___tracy_gpu_new_context_data data
     tracy::MemWrite( &item->gpuNewContext.context, data.context );
     tracy::MemWrite( &item->gpuNewContext.flags, data.flags );
     tracy::MemWrite( &item->gpuNewContext.type, data.type );
+
+#ifdef TRACY_ON_DEMAND
+    tracy::GetProfiler().DeferItem( *item );
+#endif
+
     TracyLfqCommitC;
 }
 
@@ -4270,6 +4275,11 @@ TRACY_API void ___tracy_emit_gpu_context_name( const struct ___tracy_gpu_context
     tracy::MemWrite( &item->gpuContextNameFat.context, data.context );
     tracy::MemWrite( &item->gpuContextNameFat.ptr, (uint64_t)ptr );
     tracy::MemWrite( &item->gpuContextNameFat.size, data.len );
+
+#ifdef TRACY_ON_DEMAND
+    tracy::GetProfiler().DeferItem( *item );
+#endif
+
     TracyLfqCommitC;
 }