Treat the x*1 generated by parsing a unary + as containing a dot.

Treat the x*1 generated by parsing a unary + as containing a dot.

Since we convert +x to x*1, we loose information about whether
the 1 was intended to be a floating point value for asm.js or not.

Mark the generated 1 as containing a dot (i.e. 1.0).

BUG= https://code.google.com/p/v8/issues/detail?id=4203
TEST=test-parser
R=rossberg@chromium.org,titzer@chromium.org
LOG=N

Committed: https://crrev.com/4d3a0a7ce69c6ac3210018664368f0e29da6df0d
Cr-Commit-Position: refs/heads/master@{#30481}

[bradn, 2015-08-30 06:34:22]

Patchset #1 (id:1) has been deleted

[titzer, 2015-08-31 08:20:06]

lgtm

[bradn, 2015-08-31 16:12:52]

The CQ bit was checked by bradnelson@google.com

[commit-bot: I haz the power, 2015-08-31 16:12:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1306683003/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1306683003/20001

[commit-bot: I haz the power, 2015-08-31 16:35:56]

Committed patchset #1 (id:20001)

[commit-bot: I haz the power, 2015-08-31 16:36:13]

Patchset 1 (id:??) landed as
https://crrev.com/4d3a0a7ce69c6ac3210018664368f0e29da6df0d
Cr-Commit-Position: refs/heads/master@{#30481}