PNaCl: Compile newlib and libstdc++ with debugging info
PNaCl: Compile newlib and libstdc++ with debugging info

This makes it easier to debug non-stripped (non-finalised) pexes when
there are failures in libc code.  This change will increase the size
of the PNaCl toolchain tarball but it won't affect stripped
(finalised) pexes.

BUG=none
TEST=PNaCl toolchain trybots
  + check pnacl-translate'd hello_world.nonfinal.pexe with "objdump -dl"
  (e.g. look for source code line number info in exit())

Review URL: https://codereview.chromium.org/15043007

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11343 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client