Jeff Hostetler authored Oct 10, 2022 and Junio C Hamano committed Oct 10, 2022

Add the "-Wno-missing-braces" option when building with an old version
of clang to suppress the "suggest braces around initialization" error
in developer mode.

For example, using an old version of clang gives the following errors
(when in DEVELOPER=1 mode):

$ make builtin/merge-file.o
    CC builtin/merge-file.o
builtin/merge-file.c:29:23: error: suggest braces around initialization \
			    of subobject [-Werror,-Wmissing-braces]
        mmfile_t mmfs[3] = { 0 };
                             ^
                             {}
builtin/merge-file.c:31:20: error: suggest braces around initialization \
			    of subobject [-Werror,-Wmissing-braces]
        xmparam_t xmp = { 0 };
                          ^
                          {}
2 errors generated.

This example compiles without error/warning with updated versions of
clang.  Since this is an obsolete error, use the -Wno-missing-braces
option to silence the warning when using an older c...