Merge remote-tracking branch 'gnu-gcc/master' into bobdev

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gcc/ChangeLog

gcc/DATESTAMP

gcc/Makefile.in

gcc/ada/ChangeLog

gcc/ada/gcc-interface/utils.cc

gcc/ada/sem_aggr.adb

gcc/ada/sem_warn.adb

gcc/asan.cc

gcc/c/ChangeLog

gcc/c/c-decl.cc

gcc/c/c-parser.cc

gcc/c/gimple-parser.cc

gcc/combine.cc

gcc/common/config/aarch64/aarch64-common.cc

gcc/config.in

gcc/config/aarch64/aarch64-arches.def

gcc/config/aarch64/aarch64-elf.h

gcc/config/aarch64/aarch64-feature-deps.h

gcc/config/aarch64/aarch64-option-extensions.def