Fix binutils compilation error with Clang 8
Summary:
This change fixes the following compilation error when using clang 8 to cross
compile base to powerpc64:
/usr/src/gnu/usr.bin/binutils/libopcodes/../../../../contrib/binutils/opcodes/ppc-dis.c:100:35: error: arithmetic on a null pointer treated as a cast from integer to pointer is a GNU extension [-Werror,-Wnull-pointer-arithmetic] info->private_data = (char *) 0 + dialect; ~~~~~~~~~~ ^ 1 error generated. *** [ppc-dis.o] Error code 1 make[6]: stopped in /usr/src/gnu/usr.bin/binutils/libopcodes 1 error
Test Plan:
- buildworld for x86_64 (native)
- buildworld for powerpc64 (cross)
- buildworld for powerpc64 (native)
Submitted by: alfredo.junior_eldorado.org.br
Reviewed By: emaste, pfg, brooks
Differential Revision: https://reviews.freebsd.org/D19235