Don't print debugging messages to stdout.

There is some debugging code in cxa_demangle.cpp that prints messages on
stdout. In general this is not safe, as the program itself may use
stdout to write its output. Change this code to write to stderr.

Differential Revision:	http://reviews.llvm.org/D8167


git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@232716 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed