init.rc: Restored TCP performance tuning

This patch tunes the TCP buffer sizes for high
performance data links including global max rmem
and wmem.

Change-Id: I78dc92bc8190883686678230b0a34a8e32507fa5
CRs-Fixed: 439205 435908
sdcard: Allow building as a static library

 * Split main() out in order to allow linking with a multi-call
   executable such as recovery.

Conflicts:
	sdcard/Android.mk

Change-Id: I3325135e47e4dd5af3912f5ce67ec64007d54a63
Merge remote-tracking branch 'upstream/kitkat-remix' into kitkat-remix