Add .gitignore files

[peter: add /.config]

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

.gitignore

@@ -0,0 +1,10 @@
+/build_*
+/project_*
+/toolchain_*
+/binaries/*
+/.auto.deps
+/.config.cmd
+/.config.old
+/.config
+*.depend
+*.o

package/config/.gitignore

@@ -0,0 +1,6 @@
+/buildroot-config
+/conf
+/mconf
+/lex.zconf.c
+/zconf.hash.c
+/zconf.tab.c