Fix grep -f.

bionic has getline now.

Change-Id: I5e4ee137768ab3113dbe8a07406fa39f4b6546af
diff --git a/toolbox/grep/grep.c b/toolbox/grep/grep.c
index b5bb2ef..5a4fa0c 100644
--- a/toolbox/grep/grep.c
+++ b/toolbox/grep/grep.c
@@ -294,10 +294,8 @@
 		err(2, "%s", fn);
 	line = NULL;
 	len = 0;
-#ifndef ANDROID
 	while ((rlen = getline(&line, &len, f)) != -1)
 		add_pattern(line, *line == '\n' ? 0 : (size_t)rlen);
-#endif
 	free(line);
 	if (ferror(f))
 		err(2, "%s", fn);