Log Message:
gdb: Upgrade to 8.0.1

pkgsrc specific changes
-----------------------

Set on NetBSD debug-dir to locale properly debug info of the base softwate:
    --with-separate-debug-dir=/usr/lib/debug

Disable globally binutils, gprof, gold, gas, ld. These packages are shipped
separately in other packages.

Upstream changelog
==================
GDB 8.0.1 brings the following fixes and enhancements over GDB 8.0:

  * PR breakpoint/21886 (Compressed MIPS code debugging impossible due to memory \ 
breakpoint misplacement)
  * PR symtab/22002 (Assertion on debuggee built with -gdwarf-5 \ 
-fdebug-types-section)
  * PR symtab/22003 (Incompatibility with -gdwarf-5 - DW_FORM_implicit_const)
  * PR gdb/22046 (Regression on older kernels for T (stopped) processes)
  * PR sim/20863 (gdb-7.12 powerpc-rtems4.12-gdb does not build on FreeBSD)
  * PR breakpoint/21555 ("error re-setting breakpoint" on PIE executables)
  * PR tdep/21717 ("print $fpscr" says "<unavailable>" \ 
until some VFP data register is printed)
  * PR exp/21827 (Regression: gdb command lookup became case-sensitive; but \ 
definitions are forced into lowercase)
  * PR remote/22021 (Multi-arch exec fails with a remote target)