Always init gnu_debugdata interface if it exists.

Every real call always sets the value to true to init the gnu_debugdata
interface, so remove this parameter.

Test: Builds, unit tests pass.
Change-Id: I07fb3adbbd5b65b51c0dc7608561e820a5095051
diff --git a/libunwindstack/Global.cpp b/libunwindstack/Global.cpp
index b449c7e..f0ad2b6 100644
--- a/libunwindstack/Global.cpp
+++ b/libunwindstack/Global.cpp
@@ -46,7 +46,7 @@
     }
   }
 
-  Elf* elf = info->GetElf(memory_, true);
+  Elf* elf = info->GetElf(memory_);
   uint64_t ptr;
   // Find first non-empty list (libraries might be loaded multiple times).
   if (elf->GetGlobalVariable(variable, &ptr) && ptr != 0) {