Another follow-up to r1149456: fix m4 escaping.
Another follow-up to r1149456: fix m4 escaping.

* build/ac-macros/berkeley-db.m4
  (SVN_LIB_BERKELEY_DB_TRY): Restore a lost set of []s.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1149671 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion