tools: split libxenvchan into new tools/libs/vchan directory

There is no reason why libvchan is not placed in the tools/libs
directory.

At the same time move libxenvchan.h to a dedicated include directory
in tools/libs/vchan in order to follow the same pattern as the other
libraries in tools/libs.

As tools/libvchan now contains no library any longer rename it to
tools/vchan.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wl@xen.org>

tools/Rules.mk

@@ -19,7 +19,6 @@ XEN_libxenlight    = $(XEN_ROOT)/tools/libxl
 # Currently libxlutil lives in the same directory as libxenlight
 XEN_libxlutil      = $(XEN_libxenlight)
 XEN_libxenstat     = $(XEN_ROOT)/tools/xenstat/libxenstat/src
-XEN_libxenvchan    = $(XEN_ROOT)/tools/libvchan
 
 CFLAGS_xeninclude = -I$(XEN_INCLUDE)
 
@@ -114,11 +113,6 @@ SHDEPS_libxenstat  = $(SHLIB_libxenctrl) $(SHLIB_libxenstore)
 LDLIBS_libxenstat  = $(SHDEPS_libxenstat) $(XEN_libxenstat)/libxenstat$(libextension)
 SHLIB_libxenstat   = $(SHDEPS_libxenstat) -Wl,-rpath-link=$(XEN_libxenstat)
 
-CFLAGS_libxenvchan = -I$(XEN_libxenvchan) $(CFLAGS_libxengnttab) $(CFLAGS_libxenevtchn)
-SHDEPS_libxenvchan = $(SHLIB_libxentoollog) $(SHLIB_libxenstore) $(SHLIB_libxenevtchn) $(SHLIB_libxengnttab)
-LDLIBS_libxenvchan = $(SHDEPS_libxenvchan) $(XEN_libxenvchan)/libxenvchan$(libextension)
-SHLIB_libxenvchan  = $(SHDEPS_libxenvchan) -Wl,-rpath-link=$(XEN_libxenvchan)
-
 ifeq ($(debug),y)
 # Disable optimizations
 CFLAGS += -O0 -fno-omit-frame-pointer