规范化libc.map.txt文件

在libc.map.txt中在global中剔除在local中出现的选项，将local置为*，补充global缺失的选项

Issue: https://gitee.com/openharmony/third_party_musl/issues/I70WI9
Test: 编译构建libc
Signed-off-by: zzulilyw <378305181@qq.com>

libc.map.txt

@@ -1983,6 +1983,12 @@
     malloc_enable;
     malloc_info;
     malloc_iterate;
+    GetLabelIndex;
+    tcgetwinsize;
+    _Fork;
+    malloc_backtrace;
+    tcsetwinsize;
+    qsort_r;
   local:
     *;
 };