libmincrypt: fix clang build

Summary:
libmincrypt is built with Werror, and clang warns on unused const variables.
Set p256_one as an unused attribute

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D91
sync_test: Use -fno-strict-aliasing

Summary:
Use -fno-strict-aliasing here so we don't have to use it globally.
Performance on tests isn't important anyway.

Change-Id: I92ae7209ced60176cc5608f32b8ff6a911c09f10
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D102
logcat: conform string literals to C++11

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D104
Unicode: Fix mismatched type initialization

Summary:
Fixes the following:
system/core/libutils/Unicode.cpp:579:27: error: cannot initialize a variable of type 'const uint16_t *const' (aka 'const
unsigned short *const') with an rvalue of type 'char16_t *'
    const uint16_t* const u16end = dst + dstLen;
                          ^        ~~~~~~~~~~~~

Test Plan: verifying

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D117
Fix errors to combine with previous declaration specifier

Summary:
Fixes the following:
system/core/include/utils/Unicode.h:25:18: error: cannot combine with previous 'type-name' declaration specifier
typedef uint32_t char32_t;
                 ^
system/core/include/utils/Unicode.h:26:18: error: cannot combine with previous 'type-name' declaration specifier
typedef uint16_t char16_t;
                 ^

system/core/include/cutils/jstring.h:27:18: error: cannot combine with previous 'type-name' declaration specifier
typedef uint16_t char16_t;
                 ^

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D119