Fix new git workflow in release scripts.

Need to svn fetch in order to make svn find-rev work.

BUG=chromium:410721
LOG=n
TEST=script_test.py
TBR=tandrii@chromium.org

Review URL: https://codereview.chromium.org/662643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24666 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Fix code for InstanceofStub.

Port r24654 (66aa0fb)

BUG=
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/661803002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24667 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Eliminate special keyed load string stub in favor of uniform handlers.

Port r24661 (5499efb)

Original commit message:
KeyedLoadIC installs a special case if the receiver is a string.
Although there are several maps for strings, in practice we seem to
be able to treat them individually because a given KeyedLoad site
only sees 1-2 string types.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/657413002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24668 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/bleeding_edge' into bleeding_edge