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 ||

external/bsd/kyua-testers/dist/atf_list.c

@@ -256,7 +256,7 @@ parse_test_case(FILE* input, FILE* output, char* name)
     while (!kyua_error_is_set(error) &&
            fgets_no_newline(line, sizeof(line), input) != NULL &&
            strcmp(line, "") != 0) {
-        char* key; char* value;
+        char* key = NULL; char* value = NULL;
         error = parse_property(line, &key, &value);
         if (!kyua_error_is_set(error)) {
             const char* out_key = rewrite_property(key);
@@ -300,7 +300,7 @@ parse_tests(FILE* input, FILE* output)
     kyua_error_t error;
 
     do {
-        char* key; char* value;
+        char* key = NULL; char* value = NULL;
         error = parse_property(line, &key, &value);
         if (kyua_error_is_set(error))
             break;

external/bsd/kyua-testers/dist/fs.c

@@ -518,7 +518,7 @@ kyua_fs_make_absolute(const char* original, char** const output)
         strcpy(*output, original);
         return kyua_error_ok();
     } else {
-        char* current_path;
+        char* current_path= NULL;
         kyua_error_t error;
 
         error = kyua_fs_current_path(&current_path);

usr.bin/make/suff.c

@@ -684,8 +684,8 @@ GNode *
 Suff_AddTransform(char *line)
 {
     GNode         *gn;		/* GNode of transformation rule */
-    Suff          *s,		/* source suffix */
-                  *t;		/* target suffix */
+    Suff          *s = NULL,	/* source suffix */
+                  *t = NULL;	/* target suffix */
     LstNode 	  ln;	    	/* Node for existing transformation */
 
     ln = Lst_Find(transforms, line, SuffGNHasNameP);