Merge pull request swiftlang#16 from compnerd/modules

CSQLite: add `module.modulemap`

Author: compnerd

Sources/CSQLite/include/module.modulemap

@@ -0,0 +1,5 @@
+
+module SwiftToolchainCSQLite {
+  header "sqlite3.h"
+  header "sqlite3ext.h"
+}