[NaCl SDK] nacl_mounts: wrap functions.

native_client_sdk/src/libraries/gtest/nacl_gtest_dummy_sys.cc

Index: native_client_sdk/src/libraries/gtest/nacl_gtest_dummy_sys.cc
diff --git a/native_client_sdk/src/libraries/gtest/nacl_gtest_dummy_sys.cc b/native_client_sdk/src/libraries/gtest/nacl_gtest_dummy_sys.cc
index ef7cf61f10dd0607c41bb9c04203695d84e0fce3..015ad094b5c4e9ea956c29eb23dd2fc3654c0400 100644
--- a/native_client_sdk/src/libraries/gtest/nacl_gtest_dummy_sys.cc
+++ b/native_client_sdk/src/libraries/gtest/nacl_gtest_dummy_sys.cc
@@ -12,6 +12,10 @@ extern "C" {
 
 #if defined(__native_client__)
 
+char* getcwd(char* buf, size_t size) __attribute__ ((weak));
+int unlink(const char* pathname) __attribute__ ((weak));
+int mkdir(const char* pathname, mode_t mode) __attribute__ ((weak));
+
 char* getcwd(char* buf, size_t size) {
   if (size < 2) {
     errno = ERANGE;