audio/oss: Build fix for clang 19

PR:		ports/282164
Thanks to:	dim

audio/oss/files/patch-kernel_framework_sndstat_oss__sndstat.c

@@ -0,0 +1,26 @@
+Thanks to dim@
+
+Clang 19 has become more strict about erroneous redeclarations, which
+results in an error building audio/oss:
+
+  oss_sndstat.c:114:17: error: redeclaration of 'version' with a different type: 'char[]' vs 'const char[]'
+    114 |     extern char version[];
+        |                 ^
+  /usr/include/sys/systm.h:54:19: note: previous declaration is here
+     54 | extern const char version[];    /* system version */
+        |                   ^
+
+Since version[] has been a const char for quite a while now, adjust the
+redeclaration in oss_sndstat.c. Note that it also might be deleted
+entirely, since the file already includes <sys/systm.h>.
+
+--- kernel/framework/sndstat/oss_sndstat.c.orig	2024-10-17 19:27:09 UTC
++++ kernel/framework/sndstat/oss_sndstat.c
+@@ -111,7 +111,6 @@ init_status (void)
+ #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
+   {
+ #if defined(__FreeBSD__)
+-    extern char version[];
+ #endif
+ 
+     put_status ("Kernel: ");