tools/libfsimage: Rename /usr/lib/fs to /usr/lib/xenfsimage

Again, avoid namespace pollution.  These paths are purely internal to
libfsimage and its fs-specific modules, so no visible change from the
outside.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

tools/libfsimage/Rules.mk

@@ -6,7 +6,7 @@ LDFLAGS += -L../common/
 
 PIC_OBJS := $(patsubst %.c,%.opic,$(LIB_SRCS-y))
 
-FSDIR = $(libdir)/fs
+FSDIR = $(libdir)/xenfsimage
 
 FSLIB = fsimage.so