Merge remote-tracking branch 'origin/releases/gcc-11' into devel/omp/gcc-11

Merge up to r11-8966-g57f6800aefdd102cd43f0df53ca8bcbcc7202b41 (Sept 6, 2021)

diff --cc gcc/fortran/match.c
Simple merge

diff --cc gcc/fortran/resolve.c
Simple merge

diff --cc gcc/tree-nested.c
Simple merge