Revert "[Sanitizers][Darwin] In DlAddrSymbolizer, return only the module file name instead of the comlpete module path during symbolication."

The commit broke asan_symbolize.py script on Darwin which depended on
using the complete module path to symolize crash traces offline.

This reverts commit f6ea869.

rdar://110487521

Author: usama54321

Diff for: compiler-rt/lib/sanitizer_common/sanitizer_symbolizer_mac.cpp

@@ -41,12 +41,6 @@ bool DlAddrSymbolizer::SymbolizePC(uptr addr, SymbolizedStack *stack) {
     stack->info.function_offset = addr - sym_addr;
   }
 
-  if (info.dli_fname) {
-    if (auto *last_occurence = internal_strrchr(info.dli_fname, '/')) {
-      stack->info.module = internal_strdup(last_occurence + 1);
-    }
-  }
-
   const char *demangled = DemangleSwiftAndCXX(info.dli_sname);
   if (!demangled) return false;
   stack->info.function = internal_strdup(demangled);