Provides some of the missing POSIX file syscalls

src/trusted/service_runtime/sys_filename.h

Index: src/trusted/service_runtime/sys_filename.h
diff --git a/src/trusted/service_runtime/sys_filename.h b/src/trusted/service_runtime/sys_filename.h
index 0d9721badaabbdccb5c41d96c458fe795b3f741f..c45325182fa69d895b829582907523a8eb071769 100644
--- a/src/trusted/service_runtime/sys_filename.h
+++ b/src/trusted/service_runtime/sys_filename.h
@@ -10,6 +10,8 @@
 #include "native_client/src/include/nacl_base.h"
 #include "native_client/src/include/portability.h"
 
+#include "native_client/src/trusted/service_runtime/include/sys/stat.h"
+
 EXTERN_C_BEGIN
 
 struct NaClApp;
@@ -50,6 +52,43 @@ int32_t NaClSysGetcwd(struct NaClAppThread *natp,
 int32_t NaClSysUnlink(struct NaClAppThread *natp,
                       uint32_t             path);
 
+int32_t NaClSysTruncate(struct NaClAppThread *natp,
+                        uint32_t             path,
+                        nacl_abi_off_t       length);
+
+int32_t NaClSysLstat(struct NaClAppThread *natp,
+                     uint32_t             path,
+                     struct nacl_abi_stat *buf);
+
+int32_t NaClSysLink(struct NaClAppThread *natp,
+                    uint32_t             oldpath,
+                    uint32_t             newpath);
+
+int32_t NaClSysChmod(struct NaClAppThread *natp,
+                     uint32_t             pathname,
+                     int                  mode);
+
+int32_t NaClSysAccess(struct NaClAppThread *natp,
+                      uint32_t             pathname,
+                      int                  mode);
+
+int32_t NaClSysRename(struct NaClAppThread *natp,
+                      uint32_t             oldpath,
+                      uint32_t             newpath);
+
+int32_t NaClSysReadlink(struct NaClAppThread *natp,
+                        uint32_t             path,
+                        uint32_t             buf,
+                        size_t               bufsiz);
+
+int32_t NaClSysSymlink(struct NaClAppThread *natp,
+                       uint32_t             oldpath,
+                       uint32_t             newpath);
+
+int32_t NaClSysUtimes(struct NaClAppThread *natp,
+                      uint32_t             filename,
+                      uint32_t             times);
+
 EXTERN_C_END
 
 #endif