Add windres to TOOL_PROGS

I sent a patch to GCC adding support for passing .rc and .res files to the
driver directly, allowing support for doing things like:

gcc file.c file.rc -o file.exe

However, binutils doesn't install windres into the tooldir, so by default, gcc
will be unable to find windres. This patch adds windres to TOOL_PROGS so this
can work.

binutils/ChangeLog:

	* Makefile.am (TOOL_PROGS): Add windres.
	* Makefile.in: Regenerate.

Signed-off-by: Peter Damianov <peter0x44@disroot.org>