pprof: disable flaky inlining test

This test has been flaking on arm64 and amd64 builders for quite a
while. Reproducing is possible, but takes time, and isn't a priority in
the team.  Skipping this test as it also isn't blocking anybody's work
or causing issues.

Bug: 72646
Change-Id: Ic4f6c72db3e0754095cb880ad97177b49bc456ba
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/go/+/557984
Commit-Queue: Devon H. O'Dell <dhobsd@google.com>
Fuchsia-Auto-Submit: Devon H. O'Dell <dhobsd@google.com>
Reviewed-by: Tamir Duberstein <tamird@google.com>
diff --git a/src/runtime/pprof/pprof_test.go b/src/runtime/pprof/pprof_test.go
index cba6faf..db1f614 100644
--- a/src/runtime/pprof/pprof_test.go
+++ b/src/runtime/pprof/pprof_test.go
@@ -148,6 +148,10 @@
 }
 
 func TestCPUProfileInlining(t *testing.T) {
+	if runtime.GOOS == "fuchsia" {
+		t.Skip("TODO(https://fxbug.dev/72646): flaking on Fuchsia")
+	}
+
 	if !containsInlinedCall(inlinedCaller, 4<<10) {
 		t.Skip("Can't determine whether inlinedCallee was inlined into inlinedCaller.")
 	}