Revert "configure: fix cross-compilation host_arch_cc()"

Several people have reported cross-compiling build breakage, see e.g.
https://groups.google.com/forum/#!topic/nodejs/k8HzqpqPkJQ

Message-Id: <823c3bd1-e104-4409-86ad-0ab6de936fec@googlegroups.com>
Subject: [nodejs] nodejs 0.10.12 and Angstrom issues

This reverts commit acbdabb74b1b8484671fd3c44cd9eb9a7ea11f41.
doc: tls: ECDH ciphers are not supported
blog: v0.11.3 release
buffer: add comment explaining buffer alignment

Avoids alignment issues (unaligned loads/stores) on ARM. Originally
added in commit 285d8c6.

Fixes #3030.
doc: vm: update github issues link
zlib: allow zero values for level and strategy

This is a back-port of commit c9644fb from the master branch.
zlib: level can be negative

This is a back-port of commit e945903 from the master branch.
http: use an unref'd timer to fix delay in exit

There was previously up to a second exit delay when exiting node
right after an http request/response, due to the utcDate() function
doing a setTimeout to update the cached date/time.

Fixing this should increase the performance of our http tests.
test: fix tls-hello-parser-failure on smartos

Assert that when the client closes it has seen an error, this prevents
the test from timing out.

Also queue a second write in the case that we were able to send the
buffer before the other side closed the connection.
slab_allocator: remove SlabAllocator

Now that Buffer instantiation has improved, the SlabAllocator is an
unnecessary layer of complexity preventing further performance
optimizations.

Currently there is a small performance loss with very small stream
requests, but this will soon be addressed.
smalloc: use malloc instead of new

To use realloc the implementation had to be changed to use malloc/free.
{stream,udp,tls}_wrap: remove unused offset/length

The function arguments offset and length are now no longer used since
all I/O requests now use discretely allocated memory.
stream: objectMode transform should allow falsey values

If a transform stream has objectMode = true, it should
allow falsey values other than (null) like 0, false, ''.

null is reserved to indicate stream eof but other falsey
values should flow through properly.
src: fix memory leak in UsingDomains()

UsingDomains() assigned process_tickCallback when it had already
been set by MakeCallback() a few frames down the call stack.

Dispose the handle first or we'll retain whatever is in the lexical
closure of the old process._tickCallback function.

Fixes #5795.
Merge remote-tracking branch 'origin/v0.10'

Conflicts:
	lib/buffer.js
	lib/http.js
	src/node.cc
doc: remove obsolete spawn() stdio options
doc: remove mention of maxTickDepth

maxTickDepth has been removed, but mention of it was left in the docs.
Also added explanation that nextTick is allowed to starve I/O.
smalloc: fix style, use macro
buffer: use macro
smalloc: revert change to use pointer indirection

Better to compare fixed addresses than to use pointer indirection.