HostInterface: Fix compile error on Linux

src/core/host_interface.cpp

@@ -12,6 +12,8 @@
 #include "spu.h"
 #include "system.h"
 #include "timers.h"
+#include <cstring>
+#include <cmath>
 #include <imgui.h>
 Log_SetChannel(HostInterface);
 
@@ -23,8 +25,6 @@ Log_SetChannel(HostInterface);
 
 #if defined(ANDROID) || (defined(__GNUC__) && __GNUC__ < 8)
 
-#include <cstring>
-
 static std::string GetRelativePath(const std::string& path, const char* new_filename)
 {
   const char* last = std::strrchr(path.c_str(), '/');