When -O0 is specified to the translation step, disable frame pointer elimination
When -O0 is specified to the translation step, disable frame pointer elimination

Since we are using O0 for debugging (and since current fast-translation efforts
may even make it reliably useful), enable the frame pointer (i.e. disable
fp elimination) when O0 is passed to pnacl-translate, to make debugging more
useful.

This keeps the current behavior of O2 (with fp-elim) by default, which
we may want to rethink in the future.

R=jvoung@chromium.org
TEST=(none, but may help improve gdb tests)
BUG= http://code.google.com/p/nativeclient/issues/detail?id=3252

Review URL: https://codereview.chromium.org/11817054

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@10578 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,nacl-webkit/native_client,nacl-webkit/native_client,sbc100/native_client