Update 624-checker-stringops and 911-get-stack-trace.

After https://r8-review.googlesource.com/29460, D8/R8 canonicalize
const-string if possible.

Two ART tests have some constant strings, which are canonicalized by
that optimization, while outputs still expect constant loading.

For 624-checker-stringops, we can use different constants without
changing test expectations.

For 911-get-stack-trace, every `doTest()` starts with, e.g.,

  System.out.println("######");
  System.out.println("message");
  System.out.println("######");

and one of #'s is canonicalized, hence consistenlty shifted offset in
expected outputs.

Test: art/test/testrunner/testrunner.py -b --host -t 624-checker-stringops
Test: art/test/testrunner/testrunner.py -b --host -t 911-get-stack-trace
Bug: 118235919
Change-Id: I4432fdf3e3d9cda111d0726ce930c935f2c334f0

1 files changed, 2 insertions, 2 deletions

diff --git a/test/624-checker-stringops/src/Main.java b/test/624-checker-stringops/src/Main.java
index 3aa6e563fc..f52d81a053 100644
--- a/test/624-checker-stringops/src/Main.java
+++ b/test/624-checker-stringops/src/Main.java
@@ -120,7 +120,7 @@ public class Main {
   /// CHECK-DAG:                  InvokeVirtual [<<New>>]             intrinsic:StringBufferLength
   static int bufferLen2() {
     StringBuffer s = new StringBuffer();
-    return s.append("x").append("x").length();
+    return s.append("x").append("y").length();
   }
 
   static int bufferLen2Smali() throws Exception {
@@ -150,7 +150,7 @@ public class Main {
   /// CHECK-DAG:                  InvokeVirtual [<<New>>]             intrinsic:StringBuilderLength
   static int builderLen2() {
     StringBuilder s = new StringBuilder();
-    return s.append("x").append("x").length();
+    return s.append("x").append("y").length();
   }
 
   static int builderLen2Smali() throws Exception {