add swiftUI code

iOS-SwiftUI-Code/GRDB.swift-6.29.3/SQLiteCustom/GRDBCustomSQLite-USER.xcconfig.example

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+
+// To compile SQLite with additional compilation options:
+// 1.) Add them to the "SQLiteLib-USER.xcconfig" in the SQLiteLib.xcodeproj
+// 2.) Add them to the CUSTOM_OTHER_SWIFT_FLAGS line below.
+// 3.) Optionally add them to "GRDBCustomSQLite-USER.h" to expose the appropriate SQLite APIs to framework consumers.
+//
+// See the README.md file for more details.
+//
+// How to Convert OTHER_CFLAGS to OTHER_SWIFT_FLAGS:
+//  Add a space after the "-D"
+//
+//  Example:
+//  OTHER_CFLAGS = -DSQLITE_ENABLE_PREUPDATE_HOOK -DSQLITE_ENABLE_FTS5
+//  becomes:
+//  CUSTOM_OTHER_SWIFT_FLAGS = -D SQLITE_ENABLE_PREUPDATE_HOOK -D SQLITE_ENABLE_FTS5
+
+CUSTOM_OTHER_SWIFT_FLAGS =
+