- update valgrind.xen.patch to branch bug390553-20181125-ddfc274b2

- build against Toolchain module for SLE12
- add 0001-Bug-397187-s390x-Add-vector-register-support-for-vgd.patch
0001-Bug-400490-s390x-Fix-register-allocation-for-VRs-vs-.patch,
0001-Bug-400491-s390x-Sign-extend-immediate-operand-of-LO.patch,
0001-s390x-more-fixes.patch,
Implement-emulated-system-registers.-Fixes-392146.patch (FATE#326355)
- enable check (poo#36751)

- update to 3.14.0 (bsc#1114575, FATE#326355):
see http://www.valgrind.org/docs/manual/dist.news.html
* The new option --keep-debuginfo=no|yes (default no) can be used to retain
debug info for unloaded code. This allows saved stack traces (e.g. for
memory leaks) to include file/line info for code that has been dlclose'd (or
similar). See the user manual for more information and known limitations.
* Ability to specify suppressions based on source file name and line number.
* Majorly overhauled register allocator. No end-user changes, but the JIT
generates code a bit more quickly now.
* Preliminary support for macOS 10.13 has been added.
* mips: support for MIPS32/MIPS64 Revision 6 has been added.
* mips: support for MIPS SIMD architecture (MSA) has been added.
* mips: support for MIPS N32 ABI has been added.
* s390: partial support for vector instructions (integer and string) has been
added.
* Helgrind: Addition of a flag
--delta-stacktrace=no|yes [yes on linux amd64/x86]
which specifies how full history stack traces should be computed.
Setting this to =yes can speed up Helgrind by 25% when using
--history-level=full.