Remove include of stdlib.h from SkTypes.h.

Remove include of stdlib.h from SkTypes.h.

Unfortunately, immintrin.h (which is also included by SkTypes)
includes xmmintrin.h which includes mm_malloc.h which includes
stdlib.h for malloc even though, from the implementation, it is
difficult to see why.

Fortunately, arm_neon.h does not seem to be involved in such
shenanigans, so building for Android will keep things sane.

TBR=reed@google.com
Doesn't change Skia API, just moves an include.

Committed: https://skia.googlesource.com/skia/+/60e0fee6d4acff638ccc9670c4055aced529a7a0

[bungeman-skia, 2015-08-25 20:46:59]

The CQ bit was checked by bungeman@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-08-25 20:47:06]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1313203003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1313203003/1

[commit-bot: I haz the power, 2015-08-25 20:48:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-25 20:48:38]

Dry run: Try jobs failed on following builders:
  Build-Ubuntu-GCC-Arm7-Debug-Android-Trybot on client.skia.compile (JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-GCC-Arm...)

[bungeman-skia, 2015-08-25 22:21:52]

The CQ bit was checked by bungeman@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-08-25 22:22:00]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1313203003/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1313203003/60001

[commit-bot: I haz the power, 2015-08-25 22:27:11]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-25 22:27:12]

Dry run: This issue passed the CQ dry run.

[bungeman-skia, 2015-08-25 22:31:12]

bungeman@google.com changed reviewers:
+ mtklein@google.com

[mtklein, 2015-08-26 12:14:57]

The CQ bit was checked by mtklein@google.com

[mtklein, 2015-08-26 12:14:57]

lgtm

(malloc and free are declared in stdlib.h, no?)

[commit-bot: I haz the power, 2015-08-26 12:15:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1313203003/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1313203003/60001

[commit-bot: I haz the power, 2015-08-26 12:15:50]

Committed patchset #4 (id:60001) as
https://skia.googlesource.com/skia/+/60e0fee6d4acff638ccc9670c4055aced529a7a0