Jenkins' lo_daily_update_gandalf needs --disable-werror too

...similar to d3f2c61 "Make Jenkins
linux_gcc_release_64 pick up Developer Toolset 7":

> /lo/home/tdf/lode/jenkins/workspace/lo_daily_update_gandalf/sal/osl/unx/pipe.cxx: In function ‘oslPipeImpl* osl_psz_createPipe(const sal_Char*, oslPipeOptions, oslSecurity)’:
> /lo/home/tdf/lode/jenkins/workspace/lo_daily_update_gandalf/sal/osl/unx/pipe.cxx:248:12: error: ‘char* strncpy(char*, const char*, size_t)’ output may be truncated copying 107 bytes from a string of length 4096 [-Werror=stringop-truncation]
>      strncpy(addr.sun_path, name, sizeof(addr.sun_path) - 1);
>      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

(<https://ci.libreoffice.org/job/lo_daily_update_gandalf/558/>).

Change-Id: I443337969dfdcd02a350a171e68d5032b5be22a0

distro-configs/Jenkins/LibreOfficeLinuxUpdater.conf

@@ -29,6 +29,7 @@
 --enable-python=internal
 --enable-online-update=mar
 --disable-dconf
+--disable-werror
 --with-lang=de es fr ar zh-CN
 --with-package-format=archive
 --with-update-config=~/updater.ini