[test][sanitizer] Switch test to a different group

Author: vitalybuka

compiler-rt/test/sanitizer_common/TestCases/Linux/getgrouplist.cpp

@@ -8,18 +8,18 @@
 
 int main(void) {
   gid_t *groups;
-  group *nobody;
+  group *root;
   int ngroups;
 
   ngroups = sysconf(_SC_NGROUPS_MAX);
   groups = (gid_t *)malloc(ngroups * sizeof(gid_t));
   if (!groups)
     exit(1);
 
-  if (!(nobody = getgrnam("nobody")))
+  if (!(root = getgrnam("root")))
     exit(2);
 
-  if (getgrouplist("nobody", nobody->gr_gid, groups, &ngroups) == -1)
+  if (getgrouplist("root", root->gr_gid, groups, &ngroups) == -1)
     exit(3);
 
   if (groups && ngroups) {