Update GDB revision. This checks in:
Update GDB revision.
This checks in:

055a0f7 Switch gdb command parameters parsing algorithm

R=eaeltsin@google.com

Review URL: https://codereview.chromium.org/16304006

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11521 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client,Lind-Project/native_client