commit e1aa1967e2e8852a2338034e29af88436f61ba99
author Sam Protsenko <semen.protsenko@linaro.org> Tue Nov 27 22:10:45 2018 +0200
committer Sam Protsenko <semen.protsenko@linaro.org> Tue Nov 27 22:11:09 2018 +0200
tree 08d40ca005cd405cd83057f88f18d5b012f8653c
parent 99aaf7ea93a9013f9682413f08c890b08f895518

mkimage: Fix "different signs comparison" build error

When building mkimage, clang shows next builderror:

    external/u-boot/common/bootm.c:978:16:
    error: comparison of integers of different signs:
    'int' and 'unsigned long' [-Werror,-Wsign-compare]
            for (i = 0; i < ARRAY_SIZE(image_types); i++) {
                        ~ ^ ~~~~~~~~~~~~~~~~~~~~~~~

Let's suppress checking for -Wsign-compare to fix that.

Change-Id: Ibddde1a0976f958724a97c31a82da79728d2c0e0
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>