Mark --cpu-target tests as broken on PPC

Author: vchuravy

test/cmdlineargs.jl

@@ -185,8 +185,13 @@ let exename = `$(Base.julia_cmd()) --startup-file=no`
     @test !success(`$exename --load`)
 
     # --cpu-target (requires LLVM enabled)
-    @test !success(`$exename -C invalidtarget`)
-    @test !success(`$exename --cpu-target=invalidtarget`)
+    if Sys.ARCH === :powerpc64le || Sys.ARCH === :ppc64le
+        @test_broken !success(`$exename -C invalidtarget`)
+        @test_broken !success(`$exename --cpu-target=invalidtarget`)
+    else
+        @test !success(`$exename -C invalidtarget`)
+        @test !success(`$exename --cpu-target=invalidtarget`)
+    end
 
     # -t, --threads
     code = "print(Threads.nthreads())"