codegen: allow extra attributes to functions when panic=abort

When compiling with panic=abort (or using a target that doesn't have
unwinding support), the compiler adds the "nounwind" attribute to
functions. This results in a different LLVM IR, which results in a #NNN
added after the function name:

    tail call void @bar() #13, !dbg !467
    attributes #13 = { nounwind }

...instead of:

    tail call void @bar(), !dbg !467

This commit changes the matchers to swallow the #NNN, as it's not needed
for these specific tests.

Author: pietroalbini

tests/codegen/call-metadata.rs

@@ -6,7 +6,7 @@
 #![crate_type = "lib"]
 
 pub fn test() {
-    // CHECK: call noundef i8 @some_true(), !range [[R0:![0-9]+]]
+    // CHECK: call noundef i8 @some_true(){{( #[0-9]+)?}}, !range [[R0:![0-9]+]]
     // CHECK: [[R0]] = !{i8 0, i8 3}
     some_true();
 }

tests/codegen/debug-column.rs

@@ -6,11 +6,11 @@
 fn main() {
     unsafe {
         // Column numbers are 1-based. Regression test for #65437.
-        // CHECK: call void @giraffe(), !dbg [[A:!.*]]
+        // CHECK: call void @giraffe(){{( #[0-9]+)?}}, !dbg [[A:!.*]]
         giraffe();
 
         // Column numbers use byte offests. Regression test for #67360
-        // CHECK: call void @turtle(), !dbg [[B:!.*]]
+        // CHECK: call void @turtle(){{( #[0-9]+)?}}, !dbg [[B:!.*]]
 /* ż */ turtle();
 
         // CHECK: [[A]] = !DILocation(line: 10, column: 9,

tests/codegen/mir-inlined-line-numbers.rs

@@ -19,7 +19,7 @@ pub fn example() {
 }
 
 // CHECK-LABEL: @example
-// CHECK:   tail call void @bar(), !dbg [[DBG_ID:![0-9]+]]
+// CHECK:   tail call void @bar(){{( #[0-9]+)?}}, !dbg [[DBG_ID:![0-9]+]]
 // CHECK: [[DBG_ID]] = !DILocation(line: 7,
 // CHECK-SAME:                     inlinedAt: [[INLINE_ID:![0-9]+]])
 // CHECK: [[INLINE_ID]] = !DILocation(line: 18,