- mozilla-binutils-visibility.patch to fix build issues with
gcc/binutils combination used in Leap 42.2 (boo#984637)

- build with -fno-delete-null-pointer-checks for Tumbleweed/gcc6
as long as underlying issues have been addressed upstream
(boo#986162)

- Fix running on 48bit va aarch64 (bsc#984126)
- Add patch mozilla-aarch64-48bit-va.patch

- update to Thunderbird 45.1.1
* When entering members into a mailing list, the enter key
dismissed the panel instead of just moving onto the next line
* Email without HTML elements was sent as HTML, despite
"Delivery Format: Auto-detect" option
* Options applied to a template were lost when the template was used
* Contacts could not be deleted when they were found through a search
* Views from global searches did not respect
"mail.threadpane.use_correspondents"

- The conditional testing for gcc was failing for different
openSUSE versions, drop it and apply patches unconditionally.

- Add patches to fix building with gcc >= 6:
+ mozilla-gcc6.patch: patch taken from fedora's git and is
essentially identical to upstream firefox patch:
https://hg.mozilla.org/mozilla-central/rev/55212130f19d.
+ mozilla-flexible-array-member-in-union.patch: patch taken
from upstream bmo#1272649.