don't use glibc-specific execinfo.h on uclibc builds

base/debug/stack_trace.h

Index: base/debug/stack_trace.h
diff --git a/base/debug/stack_trace.h b/base/debug/stack_trace.h
index 78f886ae1d9df86956b2d2c7e8796e8b488caf55..e6887e605fa1aea9605e1c969b81438b887d05f6 100644
--- a/base/debug/stack_trace.h
+++ b/base/debug/stack_trace.h
@@ -64,11 +64,13 @@ class BASE_EXPORT StackTrace {
   // number of elements in the returned array.
   const void* const* Addresses(size_t* count) const;
 
+#if !defined(__UCLIBC__)
   // Prints the stack trace to stderr.
   void Print() const;
 
   // Resolves backtrace to symbols and write to stream.
   void OutputToStream(std::ostream* os) const;
+#endif
 
   // Resolves backtrace to symbols and returns as string.
   std::string ToString() const;