Regressions on master at commit r14-9319 vs commit r14-9305 on Linux/x86_64

[H.J. Lu]

Regressions on master at commit r14-9319 vs commit r14-9305 on Linux/x86_64
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: btest_lto
FAIL: btest_lto
FAIL: gcc.dg/torture/convert-dfp-2.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)
FAIL: gcc.dg/torture/convert-dfp.c   -O2 -flto -fuse-linker-plugin -fno-fat-lto-objects  (test for excess errors)