libc-test: set a 1.6G max_rss for each test case

1.4G was the highest value I observed for any test case on x86_64-linux. This
change should prevent OOM conditions in CI.
f049ae6d57Alex Rønne Petersen committed on 10/1/2025, 1:25:13 AMparente5ebdf9
2 files changedLine totals unavailable