[compiler-rt] Increase kDlsymAllocPoolSize to fix test failures

Increase kDlsymAllocPoolSize on the release branch as discussed on bug
51620, as an alternative to backporting
cb0e14c and its dependencies.
The minimum size is 8192, as needed for the following test to pass:

  AddressSanitizer-i386-linux :: TestCases/Linux/long-object-path.cpp

Fixes #51620

Author: mgorny

compiler-rt/lib/asan/asan_malloc_linux.cpp

@@ -30,7 +30,7 @@ using namespace __asan;
 
 static uptr allocated_for_dlsym;
 static uptr last_dlsym_alloc_size_in_words;
-static const uptr kDlsymAllocPoolSize = 1024;
+static const uptr kDlsymAllocPoolSize = 8192;
 static uptr alloc_memory_for_dlsym[kDlsymAllocPoolSize];
 
 static inline bool IsInDlsymAllocPool(const void *ptr) {