Fix incorrect column numbers in test from r350282.

After the test was reformatted using clang-format the numbers became invalid.

llvm-svn: 350283
diff --git a/clang/test/Index/coroutines.cpp b/clang/test/Index/coroutines.cpp
index be9ddc0..5853437 100644
--- a/clang/test/Index/coroutines.cpp
+++ b/clang/test/Index/coroutines.cpp
@@ -20,5 +20,5 @@
 }
 // CHECK: [[@LINE-3]]:25: UnexposedStmt=
 // CHECK-SAME: [[@LINE-4]]:25 - [[@LINE-2]]:2]
-// CHECK: [[@LINE-4]]:5: UnexposedStmt=
-// CHECK-SAME: [[@LINE-5]]:5 - [[@LINE-5]]:14]
+// CHECK: [[@LINE-4]]:3: UnexposedStmt=
+// CHECK-SAME: [[@LINE-5]]:3 - [[@LINE-5]]:12]