Move Embedded Net Data out of Anon Namespace

fixes https://github.com/official-stockfish/Stockfish/issues/5714

closes https://github.com/official-stockfish/Stockfish/pull/5715

No functional change

src/nnue/network.cpp

@@ -38,7 +38,6 @@
 #include "nnue_common.h"
 #include "nnue_misc.h"
 
-namespace {
 // Macro to embed the default efficiently updatable neural network (NNUE) file
 // data in the engine binary (using incbin.h, by Dale Weiler).
 // This macro invocation will declare the following three variables
@@ -58,6 +57,8 @@ const unsigned char* const gEmbeddedNNUESmallEnd     = &gEmbeddedNNUESmallData[1
 const unsigned int         gEmbeddedNNUESmallSize    = 1;
 #endif
 
+namespace {
+
 struct EmbeddedNNUE {
     EmbeddedNNUE(const unsigned char* embeddedData,
                  const unsigned char* embeddedEnd,