tools: install qemu libraries to xen private directory and add rpath to it

This will prevent our qemu libraries from conflict with system qemu libraries.

Signed-off-by: Zhigang Wang <zhigang.x.wang@xxxxxxxxxx>
diff --git a/tools/Makefile b/tools/Makefile
index 992fe3e..1dfeda6 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -188,11 +188,14 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-find
 	$$source/configure --enable-xen --target-list=i386-softmmu \
 		$(QEMU_XEN_ENABLE_DEBUG) \
 		--prefix=$(PREFIX) \
+		--libdir=$(PREFIX)/lib/xen/lib \
+		--includedir=$(PREFIX)/lib/xen/include \
 		--source-path=$$source \
 		--extra-cflags="-I$(XEN_ROOT)/tools/include \
 		-I$(XEN_ROOT)/tools/libxc \
 		-I$(XEN_ROOT)/tools/xenstore \
 		-I$(XEN_ROOT)/tools/xenstore/compat \
+		-Wl,-rpath=$(PREFIX)/lib/xen/lib \
 		$(EXTRA_CFLAGS_QEMU_XEN)" \
 		--extra-ldflags="-L$(XEN_ROOT)/tools/libxc \
 		-L$(XEN_ROOT)/tools/xenstore" \