Regressions on master at commit r11-6497 vs commit r11-6453 on Linux/x86_64

[H.J. Lu]

New failures:
FAIL: gcc.dg/lto/save-temps c_lto_save-temps_0.o-c_lto_save-temps_0.o link,  -O -flto -save-temps

New passes:
FAIL: compiler driver --help=go option(s): "^ +-.*[^:.]$" absent from output: "  -fgo-embedcfg=<file>        List embedded files via go:embed"
FAIL: compiler driver --help=go option(s): "^ +-.*[^:.]$" absent from output: "  -fgo-embedcfg=<file>        List embedded files via go:embed"
FAIL: compiler driver --help=go option(s): "^ +-.*[^:.]$" absent from output: "  -fgo-embedcfg=<file>        List embedded files via go:embed"