Revert "Revert "Create libbase.""

This reverts commit a7870d88167f619e758b5bcd15b410d16da7c16b.

(cherry picked from commit c007bc3856a4cf86b8f610eb045f26a9dedc2894)
diff --git a/base/CPPLINT.cfg b/base/CPPLINT.cfg
new file mode 100644
index 0000000..5ee068e
--- /dev/null
+++ b/base/CPPLINT.cfg
@@ -0,0 +1,2 @@
+set noparent
+filter=-build/header_guard