Bug 417037 - mozStorage chokes on databases over AFP

This patch adds the SQLITE_ENABLE_LOCKING_STYLE=1 on the macintosh platform
only.  This will enable Apple-contributed code in SQLite that does file locking that works on AFP (Apple File Protocol), as well as some additional network
filesystems that the platform supports.
r=bsmedberg

db/sqlite3/src/Makefile.in

@@ -91,7 +91,17 @@ CSRCS = \
 # don't have to vacuum to make sure the data is not visible in the file.
 # -DSQLITE_ENABLE_FTS3=1 enables the full-text index module.
 # -DSQLITE_CORE=1 statically links that module into the SQLite library.
-DEFINES = -DSQLITE_SECURE_DELETE=1 -DTHREADSAFE=1 -DSQLITE_CORE=1 -DSQLITE_ENABLE_FTS3=1
+DEFINES = \
+  -DSQLITE_SECURE_DELETE=1 \
+  -DTHREADSAFE=1 \
+  -DSQLITE_CORE=1 \
+  -DSQLITE_ENABLE_FTS3=1 \
+  $(NULL)
+
+# -DSQLITE_ENABLE_LOCKING_STYLE=1 to help with AFP folders
+ifeq ($(MOZ_WIDGET_TOOLKIT),cocoa)
+DEFINES += -DSQLITE_ENABLE_LOCKING_STYLE=1
+endif
 
 ifeq ($(OS_ARCH),OS2)
 ifdef MOZ_OS2_HIGH_MEMORY