Fix cpu-features.ll opt invocation

Author: vchuravy

doc/src/devdocs/llvm.md

@@ -79,7 +79,7 @@ environment. In addition, it exposes the `-julia` meta-pass, which runs the
 entire Julia pass-pipeline over the IR. As an example, to generate a system
 image, one could do:
 ```
-opt -enable-new-pm=0 -load libjulia-internal.so -julia -o opt.bc unopt.bc
+opt -enable-new-pm=0 -load libjulia-codegen.so -julia -o opt.bc unopt.bc
 llc -o sys.o opt.bc
 cc -shared -o sys.so sys.o
 ```

test/llvmpasses/cpu-features.ll

@@ -1,4 +1,4 @@
-; RUN: opt -load libjulia-internal%shlibext -CPUFeatures -simplifycfg -S %s | FileCheck %s
+; RUN: opt -enable-new-pm=0 -load libjulia-codegen%shlibext -CPUFeatures -simplifycfg -S %s | FileCheck %s
 
 declare i1 @julia.cpu.have_fma.f64()
 declare double @with_fma(double %0, double %1, double %2)