Make Godot compile on FreeBSD

thirdparty/linuxbsd_headers/alsa/asoundlib.h

@@ -38,7 +38,11 @@
 #include <poll.h>
 #include <errno.h>
 #include <stdarg.h>
+#ifdef __FreeBSD__
+#include <sys/endian.h>
+#else
 #include <endian.h>
+#endif // __FreeBSD__
 
 #ifndef __GNUC__
 #define __inline__ inline

thirdparty/linuxbsd_headers/alsa/patches/freebsd_endian.diff

@@ -0,0 +1,16 @@
+diff --git a/thirdparty/linuxbsd_headers/alsa/asoundlib.h b/thirdparty/linuxbsd_headers/alsa/asoundlib.h
+index a546194382..598175403c 100644
+--- a/thirdparty/linuxbsd_headers/alsa/asoundlib.h
++++ b/thirdparty/linuxbsd_headers/alsa/asoundlib.h
+@@ -38,7 +38,11 @@
+ #include <poll.h>
+ #include <errno.h>
+ #include <stdarg.h>
++#ifdef __FreeBSD__
++#include <sys/endian.h>
++#else
+ #include <endian.h>
++#endif // __FreeBSD__
+ 
+ #ifndef __GNUC__
+ #define __inline__ inline