Makefile.in (bindir): Import from autoconf and pass down to submake.

Makefile.in (bindir): Import from autoconf and pass down to submake.

libada/ChangeLog:

	* Makefile.in (bindir): Import from autoconf and pass down to submake.

gcc/ada/ChangeLog:

	* gcc-interface/Makefile.in (WIN_SO_PREFIX [windows targets]): New
	Windows-specific make variable.
	(WIN_SO_INSTALL_DIR [windows targets]): Likewise.
	(install-gnatlib): Respect the above during installation when set,
	and also install any windows import library that has been built.
	(gnatlib-shared-win32): Use WIN_SO_PREFIX to name output DLL and also
	build a corresponding import library.

From-SVN: r184558