[scudo] Try to re-enabled the test on arm

[vitalybuka]

Summary

It's probably fixed by D102886.

Builder to watch https://lab.llvm.org/buildbot/#/builders/clang-cmake-armv7-full

[hctim]

LGTM

compiler-rt/lib/scudo/standalone/tests/secondary_test.cpp

template <typename Config> static void testSecondaryBasic(void) {
   L->init(&S);
   const scudo::uptr Size = 1U << 16;
   void *P = L->allocate(scudo::Options{}, Size);
   EXPECT_NE(P, nullptr);
   memset(P, 'A', Size);
   EXPECT_GE(SecondaryT::getBlockSize(P), Size);
   L->deallocate(scudo::Options{}, P);
 
-// TODO(hctim): Looks like the secondary pointer doesn't get unmapped on arm32.
-// It's not clear whether this is a kernel issue, or something in EXPECT_DEATH()
-// is mmap-ing something that uses the same vaddr space. For now, just disable
-// the test on arm32 until we can debug it further.
-#ifndef __arm__
   // If the Secondary can't cache that pointer, it will be unmapped.
   if (!L->canCache(Size)) {
     EXPECT_DEATH(
         {
           // Repeat few time to avoid missing crash if it's mmaped by unrelated
           // code.
           for (int i = 0; i < 10; ++i) {
             P = L->allocate(scudo::Options{}, Size);
             L->deallocate(scudo::Options{}, P);
             memset(P, 'A', Size);
           }
         },
         "");
-#endif // __arm__
   }
 
   const scudo::uptr Align = 1U << 16;
   P = L->allocate(scudo::Options{}, Size + Align, Align);
   EXPECT_NE(P, nullptr);
   void *AlignedP = reinterpret_cast<void *>(
       scudo::roundUpTo(reinterpret_cast<scudo::uptr>(P), Align));
   memset(AlignedP, 'A', Size);