Backport of patches that missed the FSF 10.2 release:
    
    1) Backport "Exclude debuginfo files from 'outside ELF segments' warning".
      (Keith Seitz, RH BZ 1898252)
    2) Backport "Fix crash when expanding partial symtab..."
      (Tom Tromey. gdb/27743)
    3) Backport "[gdb/server] Don't overwrite fs/gs_base with -m32"
      (Tom de Vries)