bench: Make http easier to profile

Do not run the http/simple.js server in a child process.

Fix #4831
Revert "sunos: unbreak build after v8 downgrade"

This reverts commit f80f3c5f62a3955636c1af1872ef9539a0b01cb0.
v8: fix postmortem and dtrace helper build

Regardless of previous @bnoordhuis' changes
http: fix case in 505 response status line

Fixes #4850.
build: automatically add tag for nightly builds
mips: fix openssl build
test: optionally set common.PORT via env variable
v8: work around String::WriteAscii segfault

See http://code.google.com/p/v8/issues/detail?id=2493 for details.

This commit reapplies 9668df8. The issue has been fixed upstream but
reappeared after last night's downgrade to V8 3.14.5 in commit b15a10e.

Conflicts:
	test/simple/test-buffer.js
v8: Hardfloat does not imply VFPv3, only VFPv2.

Raspberry Pi is an example.

BUG=v8:2393

Review URL: https://chromiumcodereview.appspot.com/11570061
Patch from Chi-Thanh Christopher Nguyen <nguyenchithanh@gmail.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13232 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This is a backport of v8/v8@44419ad089b729a1aab4a5f27c0833e2ce69d28b.
test: merge environment, don't overwrite

The CI system requires that some environment variables are set so merge
our variables into the current environment instead of blindly replacing
it.

This will probably have to be repeated for other tests. C'est la vie.
deps: upgrade libuv to a0c1d84