Recommended update for gcc48

This update for the system compiler gcc48 fixes the following issues:

- Support for generating IBM Z series Spectre Variant 2 fix method "expolines" was added (bsc#1083945)
- A miscompilation of SPECcpu2017 526.blender was fixed. (bsc#1082130)
- ARM Arch64 Cortex-A53 errata 843419 and 835769 were enabled by default, which could have lead
to crashes of built binaries on Cortex A53 processors like in the Raspberry Pi3. (bsc#1087932)

This update was imported from the SUSE:SLE-12:Update update project.

Fixed bugs
bnc#1082130
SLES12 SP3 - SPECcpu2017: 526.blender loops while compiling with -O3 (gcc)
bnc#1083945
SLES12 SP3 - Include backport of CVE Spectre V2 mitigation patch for GCC on s390x
bnc#1087932
[aarch64] Cortex-A53 erratum 843419 not enabled in linker (SLE12-SP3)
Selected Binaries
::import::i586::gcc48-gij-32bit ::import::i586::gcc48-gij-debuginfo-32bit ::import::i586::libgcj48-32bit ::import::i586::libgcj48-debuginfo-32bit ::import::i586::libgcj48-devel-32bit ::import::i586::libgcj48-devel-debuginfo-32bit _buildenv _statistics cpp48 cpp48-debuginfo cross-aarch64-gcc48-icecream-backend cross-armv6hl-gcc48-icecream-backend cross-armv7hl-gcc48-icecream-backend cross-i386-gcc48-icecream-backend cross-ia64-gcc48-icecream-backend cross-ppc-gcc48-icecream-backend cross-ppc64-gcc48-icecream-backend cross-ppc64le-gcc48-icecream-backend cross-s390-gcc48-icecream-backend cross-s390x-gcc48-icecream-backend cross-x86_64-gcc48-icecream-backend gcc48 gcc48-32bit gcc48-ada gcc48-ada-32bit gcc48-ada-debuginfo gcc48-c++ gcc48-c++-debuginfo gcc48-debuginfo gcc48-debugsource gcc48-fortran gcc48-fortran-32bit gcc48-fortran-debuginfo gcc48-gij gcc48-gij-32bit gcc48-gij-64bit gcc48-gij-debuginfo gcc48-gij-debuginfo-32bit gcc48-gij-debuginfo-64bit gcc48-info gcc48-java gcc48-java-debuginfo gcc48-locale gcc48-obj-c++ gcc48-obj-c++-debuginfo gcc48-objc gcc48-objc-32bit gcc48-objc-debuginfo gcc48-testresults libada48 libada48-32bit libada48-32bit-debuginfo libada48-debuginfo libasan0 libasan0-32bit libasan0-32bit-debuginfo libasan0-debuginfo libffi48 libffi48-debugsource libffi48-devel libffi48-devel-32bit libgcj48 libgcj48-32bit libgcj48-64bit libgcj48-debuginfo libgcj48-debuginfo-32bit libgcj48-debuginfo-64bit libgcj48-debugsource libgcj48-devel libgcj48-devel-32bit libgcj48-devel-64bit libgcj48-devel-debuginfo libgcj48-devel-debuginfo-32bit libgcj48-devel-debuginfo-64bit libgcj48-jar libgcj_bc1 libgcj_bc1-gcc48 libobjc4 libobjc4-32bit libobjc4-32bit-debuginfo libobjc4-debuginfo libstdc++48-devel libstdc++48-devel-32bit libstdc++48-doc
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