only use .flag section for hw builds

fido2/version.c

@@ -1,12 +1,16 @@
 #include "version.h"
 
+const version_t firmware_version 
+#ifdef SOLO
+__attribute__ ((section (".flag"))) __attribute__ ((__used__)) 
+#endif
+    =  {
+      .major = SOLO_VERSION_MAJ,
+      .minor = SOLO_VERSION_MIN,
+      .patch = SOLO_VERSION_PATCH,
+      .reserved = 0
+    };
 
-const version_t firmware_version __attribute__ ((section (".flag"))) __attribute__ ((__used__)) =  {
-  .major = SOLO_VERSION_MAJ,
-  .minor = SOLO_VERSION_MIN,
-  .patch = SOLO_VERSION_PATCH,
-  .reserved = 0
-};
 
 // from tinycbor, for a quick static_assert
 #include <compilersupport_p.h>