m8: enable lz4 compression

* also add /proc/config.gz support

Change-Id: Iaccdc00fb0fc821ee29888dfe3ef74ea95bb374a
GCC 4.9.1: fix compile warnings

Conflicts:
	drivers/power/qpnp-bms.c

Change-Id: I0e8131dae0d7462f4cf11bb0e5bd85d6bcd22f41
cpufreq: interactive: fix compiling warnings

The gcc warns like:

  cpufreq_interactive.c:745:6: warning: operation on 'ret' may be
undefined [-Wsequence-point]

It was introduced by commit cf0fad49d17cb8273ce555dd5b7afab67d7923bf.

Since sprintf(...) just return 1 (one character) in this case, ret
should not changed.
Just discarding the result of sprintf(...) leads to the result that
the committer of cf0fad49d17cb8273ce555dd5b7afab67d7923bf wants.

Change-Id: Ifed1cef6d6a31c3ed23dad03a567b3b9eddf3a57
Signed-off-by: Chih-Wei Huang <cwhuang@android-x86.org>
Signed-off-by: Dave Daynard <nardholio@gmail.com>
Fix sizeof-pointer-memaccess warning with gcc 4.8

This patch fixes wrong memcpy size when copying ltk value to
HCI_OP_LE_LTK_REPLY command.
Makefile: build with -O3

Change-Id: Ie4cf1fa708b35fb73b4e4e1b376b99a76361b593