patch-thirdparty_embree_common_sys_sysinfo_cpp

Backport of https://github.com/embree/embree/pull/379

1. we don't seem to have pthread_getaffinity_np in pthread_np.h; use sysctl
   like macos and android then.
2. just fake getExecutableFileName and get{Virtual,Resident}MemoryBytes

Index: thirdparty/embree/common/sys/sysinfo.cpp
--- thirdparty/embree/common/sys/sysinfo.cpp.orig
+++ thirdparty/embree/common/sys/sysinfo.cpp
@@ -572,6 +572,26 @@ namespace embree
 
 #endif
 
+#if defined(__OpenBSD__)
+namespace embree
+{
+  std::string getExecutableFileName()
+  {
+    return "";
+  }
+
+  size_t getVirtualMemoryBytes()
+  {
+    return 0;
+  };
+
+  size_t getResidentMemoryBytes()
+  {
+    return 0;
+  };
+}
+#endif
+
 ////////////////////////////////////////////////////////////////////////////////
 /// Mac OS X Platform
 ////////////////////////////////////////////////////////////////////////////////
@@ -622,7 +642,7 @@ namespace embree
 
 // -- GODOT start --
 // #if defined(__MACOSX__)
-#if defined(__MACOSX__) || defined(__ANDROID__)
+#if defined(__MACOSX__) || defined(__ANDROID__) || defined(__OpenBSD__)
 // -- GODOT end --
     nThreads = sysconf(_SC_NPROCESSORS_ONLN); // does not work in Linux LXC container
     assert(nThreads);