sqlite3-3.6.0

• Hooks: Support relative paths in additional_includes and additional_lib_directories.
• Hooks: Support multiple source files to compile with source: source.
• Hooks: source and name accept a map with per-OS entries and a default (e.g. source: {android: system, default: sqlite3}). Names containing a path (like foo.framework/foo) are passed to the loader as-is with source: system.
• Update SQLCipher to version 4.19.0.
• Linux: Pre-compiled libraries now support glibc 2.24.x as a minimum version (was 2.38.x before).
• Fix IndexedDbFileSystem.flush() not awaiting an ongoing write transaction.