Makefile: Make "install" depend on "trace-events-all"

We install this file to data dir but since 0ab8ed18 it's no longer
required by any objects during "make". List it explicitly as a depended
target of install and fix the broken "make install" command.
Signed-off-by: NFam Zheng <famz@redhat.com>
Message-id: 20170204143245.15974-1-famz@redhat.com
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

Makefile

@@ -589,7 +589,7 @@ endif
 endif
 
 
-install: all $(if $(BUILD_DOCS),install-doc) \
+install: all $(if $(BUILD_DOCS),install-doc) $(BUILD_DIR)/trace-events-all \
 install-datadir install-localstatedir
 ifneq ($(TOOLS),)
 	$(call install-prog,$(subst qemu-ga,qemu-ga$(EXESUF),$(TOOLS)),$(DESTDIR)$(bindir))