build-sys: add small redirecting Makefiles
These redirecting makefiles simplifies compiling from some editors and
when CWD is not the root of the source tree. This is similar to what was
introduced in systemd in 340d89e ("build-sys: add small redirecting
Makefiles to simplify compilation from within emacs")
diff --git a/.gitignore b/.gitignore
index 5bfab9a..88c8149 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,8 +3,8 @@
/*.md5sum
.deps/
.libs/
-Makefile
-Makefile.in
+/Makefile
+/Makefile.in
/aclocal.m4
/autom4te.cache/