[core, desktop] "fixes" from building on mxe/x86_64-w64-mingw32 (#396)

* well, i couldn't build the executable, but in anyway those build
  errors can come back later to bite our backs
* include missing include
* safeguard _MSC_VER only headers

* saw some of those changes on another PR but I cant find it at moment

Signed-off-by: Caio Oliveira <caiooliveirafarias0@gmail.com>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/396
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Co-committed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>

src/core/internal_network/emu_net_state.cpp

@@ -10,8 +10,10 @@
 #define NOMINMAX
 #include <windows.h>
 #include <wlanapi.h>
+#ifdef _MSC_VER
 #pragma comment(lib, "wlanapi.lib")
 #endif
+#endif
 #include <common/settings.h>
 
 #include <mutex>

src/core/internal_network/wifi_scanner.cpp

@@ -15,8 +15,10 @@ using namespace std::chrono_literals;
 #define NOMINMAX
 #include <windows.h>
 #include <wlanapi.h>
+#ifdef _MSC_VER
 #pragma comment(lib, "wlanapi.lib")
 #endif
+#endif
 
 namespace Network {
 #ifdef ENABLE_WIFI_SCAN