Fix diagnostics-dsym.test on mac-arm64

The output ordering of diagnostics-dsym.test is non-deterministic,
which cases test failures on mac-arm64 when using some toolchains that
are not shipped from the xcode. This patch change the 'CHECK' to
'CHECK-DAG' to mitigate this issue.

Author: zeroomega

clang/test/InstallAPI/diagnostics-dsym.test

@@ -19,8 +19,8 @@
 ; RUN: --verify-mode=Pedantic 2>&1 | FileCheck %s
 
 ; CHECK: violations found for arm64 
-; CHECK: foo.c:5:0: error: no declaration found for exported symbol 'bar' in dynamic library
-; CHECK: foo.c:1:0: error: no declaration found for exported symbol 'foo' in dynamic library
+; CHECK-DAG: foo.c:5:0: error: no declaration found for exported symbol 'bar' in dynamic library
+; CHECK-DAG: foo.c:1:0: error: no declaration found for exported symbol 'foo' in dynamic library
 
 ;--- foo.c
 int foo(void) {