[cfi] Add explicit -flto in create-derivers test.
This is necessary to run the test suite in ThinLTO mode - otherwise
opt complains about an input file containing several modules.
REQUIRES: asserts
-RUN: %clangxx_cfi -c -o %t1.o %S/simple-fail.cpp
+%% Explicit -flto to override possible -flto=thin in %clangxx_cfi
+RUN: %clangxx_cfi -flto -c -o %t1.o %S/simple-fail.cpp
RUN: opt -lowertypetests -debug-only=lowertypetests -o /dev/null %t1.o 2>&1 | FileCheck --check-prefix=B0 %s
B0: {{1B|B@@}}: {{.*}} size 1
-RUN: %clangxx_cfi -DB32 -c -o %t2.o %S/simple-fail.cpp
+RUN: %clangxx_cfi -DB32 -flto -c -o %t2.o %S/simple-fail.cpp
RUN: opt -lowertypetests -debug-only=lowertypetests -o /dev/null %t2.o 2>&1 | FileCheck --check-prefix=B32 %s
B32: {{1B|B@@}}: {{.*}} size 24
B32-NOT: all-ones
-RUN: %clangxx_cfi -DB64 -c -o %t3.o %S/simple-fail.cpp
+RUN: %clangxx_cfi -DB64 -flto -c -o %t3.o %S/simple-fail.cpp
RUN: opt -lowertypetests -debug-only=lowertypetests -o /dev/null %t3.o 2>&1 | FileCheck --check-prefix=B64 %s
B64: {{1B|B@@}}: {{.*}} size 54
B64-NOT: all-ones
-RUN: %clangxx_cfi -DBM -c -o %t4.o %S/simple-fail.cpp
+RUN: %clangxx_cfi -DBM -flto -c -o %t4.o %S/simple-fail.cpp
RUN: opt -lowertypetests -debug-only=lowertypetests -o /dev/null %t4.o 2>&1 | FileCheck --check-prefix=BM %s
BM: {{1B|B@@}}: {{.*}} size 84
BM-NOT: all-ones
