Fix some unintialized variables with -O3

Change-Id: I7c41b355a503f97501e9ecb768c77a80d1d7ef0c

external/bsd/atf/dist/atf-c/detail/fs.c

@@ -797,7 +797,7 @@ atf_error_t
 atf_fs_mkdtemp(atf_fs_path_t *p)
 {
     atf_error_t err;
-    char *buf;
+    char *buf = NULL;
 
     if (!check_umask(S_IRWXU, S_IRWXU)) {
         err = invalid_umask_error(p, atf_fs_stat_dir_type, current_umask());
@@ -825,7 +825,7 @@ atf_error_t
 atf_fs_mkstemp(atf_fs_path_t *p, int *fdout)
 {
     atf_error_t err;
-    char *buf;
+    char *buf = NULL;
     int fd;
 
     if (!check_umask(S_IRWXU, S_IRWXU)) {

external/bsd/atf/dist/atf-c/detail/process.c

@@ -621,7 +621,7 @@ atf_process_exec_array(atf_process_status_t *s,
                        void (*prehook)(void))
 {
     atf_error_t err;
-    atf_process_child_t c;
+    atf_process_child_t c = { .m_pid = 0, .m_stdout = 1, .m_stderr = 2 };
     struct exec_args ea = { prog, argv, prehook };
 
     PRE(outsb == NULL ||