Fix configure error when SESSION is enabled

In file included from <built-in>:318:
<command line>:39:28: warning: ISO C99 requires whitespace after the macro name [-Wc99-extensions]
#define SQLITE_ENABLE_RTREE-DSQLITE_ENABLE_SESSION 1

^

sqlite3.c:308:5: error: token is not a valid binary operator in a preprocessor subexpression
#if SQLITE_ENABLE_RTREE

^~~~~~~~~~~~~~~~~~~

<command line>:39:52: note: expanded from here
#define SQLITE_ENABLE_RTREE-DSQLITE_ENABLE_SESSION 1

~~~~~~~~~~~~~~~~~~~~~~~ ^

1 warning and 1 error generated.

• Error code 1

Approved by: portmgr (blanket)