MIPS: Avoid using dd() in Prologue when --optimize-for-size.

MIPS: Avoid using dd() in Prologue when --optimize-for-size.

Port: r17485 (0d82025)

Original commit message:
When --optimize-for-size is true, the prologue generation outputs the
pre-aging code stub address directly to the instruction stream. Previously
this was done using dd() which failed if there was any pending constant
pool entries left to be written. This CL introduces an emit_code_stub_address()
for this purpose instead.

BUG=v8:2968

[Paul Lind, 2013-11-05 20:42:09]

The mips version of dd() did not have the constant pool issue, but it's worth
committing this anyway to keep the code looking similar.

LGTM. There are a 3 comment-only nits that I will fix when committing this.

https://codereview.chromium.org/60793002/diff/1/src/mips/macro-assembler-mips.cc
File src/mips/macro-assembler-mips.cc (right):

https://codereview.chromium.org/60793002/diff/1/src/mips/macro-assembler-mips...
src/mips/macro-assembler-mips.cc:4615: // Record the stub address in the empty
space for GetCodeAgeAndParity()
Nit: add periods to this comment, and the two comments immediately above.

[Paul Lind, 2013-11-05 20:49:35]

Committed as r17508.