syslog-ng: 3.5.4.1 -> 3.6.4

Upgrade syslog-ng from 3.5.4.1 to 3.6.4.

1) Modify the syslog-ng.service-the-syslog-ng-service.patch,since the datas has been changed.
2) Delete these patches,since they are not needed any more.
    afsql-afsql_dd_insert_db-refactor.patch
    deinit-the-new-config-when-reverting-to-the.patch
    free-global-LogTemplateOptions.patch
    still-free-the-unconsumed-item.patch
    syslog-ng-verify-the-list-before-del.patch
    rewrite-expr-grammar.ym-Free-up-token.patch
    logwriter-dont-allocate-a-new-buffer.patch
3) Fix WARNING:
    QA Issue: syslog-ng-libs rdepends on libpcre, but it isn't a build dependency? [build-deps]
    QA Issue: syslog-ng rdepends on libpcre, but it isn't a build dependency? [build-deps]
4) Fix ERROR: QA Issue: non -staticdev package contains static .a library:
    work/i586-poky-linux/syslog-ng/3.6.4-r0/packages-split/syslog-ng/usr/lib/syslog-ng/libtest/libsyslog-ng-test.a' [staticdev]

Signed-off-by: Dai Caiyun <daicy.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>