runtime: print output in case of segfault in goroutine leak tests

For #76526.

Change-Id: I017e5d4c06e5de23cccc59c4c347599fecdece03
Reviewed-on: https://go-review.googlesource.com/c/go/+/726524
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>

Author: mknyszek

src/runtime/goroutineleakprofile_test.go

@@ -487,9 +487,9 @@ func TestGoroutineLeakProfile(t *testing.T) {
 	testCases = append(testCases, patternTestCases...)
 
 	// Test cases must not panic or cause fatal exceptions.
-	failStates := regexp.MustCompile(`fatal|panic|DATA RACE`)
+	failStates := regexp.MustCompile(`segmentation fault|fatal|panic|DATA RACE`)
 
-	testApp := func(exepath string, testCases []testCase) {
+	runTests := func(exepath string, testCases []testCase) {
 
 		// Build the test program once.
 		exe, err := buildTestProg(t, exepath)
@@ -598,6 +598,6 @@ func TestGoroutineLeakProfile(t *testing.T) {
 		}
 	}
 
-	testApp("testgoroutineleakprofile", testCases)
-	testApp("testgoroutineleakprofile/goker", gokerTestCases)
+	runTests("testgoroutineleakprofile", testCases)
+	runTests("testgoroutineleakprofile/goker", gokerTestCases)
 }