bootstub: move everything out of files folder, provide backwards compatible symlink

	renamed:    files/Makefile -> Makefile
	renamed:    files/bootstub.c -> bootstub.c
	new file:   files
	renamed:    files/trampoline.S -> trampoline.S

Review URL: http://codereview.chromium.org/2824020
diff --git a/files/Makefile b/Makefile
similarity index 100%
rename from files/Makefile
rename to Makefile
diff --git a/files/bootstub.c b/bootstub.c
similarity index 100%
rename from files/bootstub.c
rename to bootstub.c
diff --git a/files b/files
new file mode 120000
index 0000000..945c9b4
--- /dev/null
+++ b/files
@@ -0,0 +1 @@
+.
\ No newline at end of file
diff --git a/files/trampoline.S b/trampoline.S
similarity index 100%
rename from files/trampoline.S
rename to trampoline.S