libbacktrace: rebuild configury with GCC standard tool versions

Add required support files to the config subdirectory.

Update dtest to be based on a statically linked program.

configure.ac

@@ -33,6 +33,7 @@ AC_PREREQ(2.64)
 AC_INIT(package-unused, version-unused,, libbacktrace)
 AC_CONFIG_SRCDIR(backtrace.h)
 AC_CONFIG_HEADER(config.h)
+AC_CONFIG_MACRO_DIR(config)
 
 # with_target_subdir is used when configured as part of a GCC tree.
 if test -n "${with_target_subdir}"; then
@@ -73,8 +74,6 @@ m4_rename_force([backtrace_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 
 AC_SUBST(CFLAGS)
 
-AC_PROG_RANLIB
-
 AC_PROG_AWK
 case "$AWK" in
 "") AC_MSG_ERROR([can't build without awk]) ;;