Fixed a link problem - uname() should be extern C when used in C++ code.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9980 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/sys/utsname.h

@@ -9,6 +9,10 @@
 
 #define _SYS_NAMELEN 256
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct utsname {
 	char sysname[_SYS_NAMELEN];	/* Name of the OS */
 	char nodename[_SYS_NAMELEN];	/* Name of this node (network related) */
@@ -19,5 +23,9 @@ struct utsname {
 
 int uname(struct utsname *);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif