bpo-43851: Build SQLite with SQLITE_OMIT_AUTOINIT on macOS (GH-25413)

diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index b07def1..15a45b9 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -363,6 +363,7 @@ def library_recipes():
                             '-DSQLITE_ENABLE_FTS3_PARENTHESIS '
                             '-DSQLITE_ENABLE_JSON1 '
                             '-DSQLITE_ENABLE_RTREE '
+                            '-DSQLITE_OMIT_AUTOINIT '
                             '-DSQLITE_TCL=0 '
                  '%s' % ('','-DSQLITE_WITHOUT_ZONEMALLOC ')[LT_10_5]),
               configure_pre=[