[asan][Darwin] Simplify test (llvm#105599)

Checking order of sections is not a goal of the test.
The goal is make sure there is only one "Hello"
string and it's in __asan_cstring.

Author: vitalybuka

compiler-rt/test/asan/TestCases/Darwin/cstring_section.c

@@ -1,15 +1,11 @@
 // Test that AddressSanitizer moves constant strings into a separate section.
 
 // RUN: %clang_asan -c -o %t %s
-// RUN: llvm-objdump -s %t | FileCheck %s
+// RUN: llvm-objdump -s %t | FileCheck %s --implicit-check-not="Hello."
 
 // Check that "Hello.\n" is in __asan_cstring and not in __cstring.
 // CHECK: Contents of section {{.*}}__asan_cstring:
-// CHECK: 48656c6c {{.*}} Hello.
-// CHECK: Contents of section {{.*}}__const:
-// CHECK-NOT: 48656c6c {{.*}} Hello.
-// CHECK: Contents of section {{.*}}__cstring:
-// CHECK-NOT: 48656c6c {{.*}} Hello.
+// CHECK-NEXT: 48656c6c {{.*}} Hello.
 
 int main(int argc, char *argv[]) {
   argv[0] = "Hello.\n";