clang: set POPULATESYSROOTDEPS so that strip is present
clang: set POPULATESYSROOTDEPS so that strip is present

do_populate_sysroot will execute the cross STRIP as part of the
processing. In non-clang builds this is present via POPULATESYSROOTDEPS
pulling in binutils, but in clang builds STRIP is set to llvm-strip which
obviously isn't part of binutils.

Set POPULATESYSROOTDEPS correctly to ensure that do_populate_sysroot has
the strip binary available.

Signed-off-by: Ross Burton <cd36ec7a67dfb8d589bc66b85fd0a6cf213f3854@arm.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang