tools: allow people to compile w/out configuring

It's useful to be able to build up the host tools without having to select
a board first.  Pretty much all tools in there are config-independent
anyways.

Also add a shortcut "tools-all" to quickly build all host tools that are
actually config-independent to allow for simple test builds.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/tools/Makefile b/tools/Makefile
index 5b8c3c3..d3b1518 100644
--- a/tools/Makefile
+++ b/tools/Makefile
@@ -38,6 +38,15 @@
 #
 include $(TOPDIR)/config.mk
 
+# Enable all the config-independent tools
+ifneq ($(HOST_TOOLS_ALL),)
+CONFIG_LCD_LOGO = y
+CONFIG_CMD_NET = y
+CONFIG_INCA_IP = y
+CONFIG_NETCONSOLE = y
+CONFIG_SHA1_CHECK_UB_IMG = y
+endif
+
 # Generated executable files
 BIN_FILES-$(CONFIG_LCD_LOGO) += bmp_logo$(SFX)
 BIN_FILES-$(CONFIG_VIDEO_LOGO) += bmp_logo$(SFX)