configure: minor typo

Change-Id: I13e4b91f62a3cbe02e504004b177efdcbe939edc
Reviewed-on: https://gerrit.libreoffice.org/3754Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>

configure.ac

@@ -1437,7 +1437,7 @@ AC_ARG_WITH(libpq-path,
          the PostgreSQL-SDBC extension.])
     [
                           Usage:     --with-libpq-path=<absolute path to
-                                                  your libq installation>
+                                                  your libpq installation>
     ],
 ,)