This was requested in https://reviews.llvm.org/D68014, but I forgot
to add it before pushing the commit.
llvm-svn: 373145
# CHECK: error: undefined symbol: vtable for Foo
# CHECK: the vtable symbol may be undefined because the class is missing its key function (see https://lld.llvm.org/missingkeyfunction)
+# Check that this symbol isn't demangled
+
# CHECK: error: undefined symbol: __Z3fooi
# CHECK: >>> referenced by undef.s
# CHECK: >>> {{.*}}:(.text+0x1A)