[llvm] [LegacyPM][CGSCC] Print banner with newline when filter-print-funcs is given. (PR #153699)

[Andy Kaylor via llvm-commits]

================
@@ -701,12 +700,11 @@ namespace {
           }
         } else if (isFunctionInPrintList("*")) {
           PrintBannerOnce();
-          OS << "\nPrinting <null> Function\n";
+          OS << "Printing <null> Function\n";
----------------
andykaylor wrote:

I don't have a strong preference either, but I like whitespace between IR and banners. What I'm picture is this:

```
*** IR Dump After Function Integration/Inlining (inline) ***

Printing <null> Function

; Function attrs:
define @foo() {
...
}

Printing <null> Function

; Function attrs:
define @bar() {
...
}

*** IR Dump After ... ***
```
versus this:

```
*** IR Dump After Function Integration/Inlining (inline) ***
Printing <null> Function

; Function attrs:
define @foo() {
...
}
Printing <null> Function

; Function attrs:
define @bar() {
...
}

*** IR Dump After ... ***
```

I'd prefer the former, but without running a dump I'm not sure I've even pictured it correctly.

https://github.com/llvm/llvm-project/pull/153699