[BoundsSafety][LLDB] Fix lldb/test/Shell/BoundsSafety/boundssafetytrap.test

When swiftlang#11621
(a4898c2) landed it broke this test
because the trap reason string changed and this test wasn't updated.

rdar://162886933
(cherry picked from commit 434475a)

Author: delcypher

lldb/test/Shell/BoundsSafety/boundssafetytrap.test

@@ -2,7 +2,7 @@
 # RUN: %clang_host -Xclang -fbounds-safety -g -O0 %S/Inputs/boundsSafetyTrap.c -o %t.out
 # RUN: %lldb -b -s %s %t.out | FileCheck %s
 run
-# CHECK: thread #{{.*}}stop reason = Bounds check failed: Dereferencing above bounds
+# CHECK: thread #{{.*}}stop reason = Bounds check failed: indexing above upper bound in 'array[index]'
 frame info
 # CHECK: frame #{{.*}}`bad_read(index=10) at boundsSafetyTrap.c
 frame recognizer info 0