testing/bmake: disable as it fails on x86 builders

gcc -Wl,--as-needed -o bmake main.o meta.o arch.o buf.o compat.o cond.o dir.o for.o getopt hash.o job.o make.o make_malloc.o metachar.o parse.o sigcompat.o str.o strlist.o suff.o targ.o trace.o var.o util.o lstAppend.o lstDupl.o lstInit.o lstOpen.o lstAtEnd.o lstEnQueue.o lstInsert.o lstAtFront.o lstIsAtEnd.o lstClose.o lstFind.o lstIsEmpty.o lstRemove.o lstConcat.o lstFindFrom.o lstLast.o lstReplace.o lstFirst.o lstDatum.o lstForEach.o lstMember.o lstSucc.o lstDeQueue.o lstForEachFrom.o lstDestroy.o lstNext.o lstPrev.o stresep.o
usage: bmake [-BeikNnqrstWwX]
            [-C directory] [-D variable] [-d flags] [-f makefile]
            [-I directory] [-J private] [-j max_jobs] [-m directory] [-T file]
            [-V variable] [-v variable] [variable=value] [target ...]
>>> ERROR: bmake: build failed

testing/bmake/APKBUILD

@@ -4,7 +4,7 @@ pkgver=20180919
 pkgrel=0
 pkgdesc="Portable version of the NetBSD make build tool"
 url="http://www.crufty.net/help/sjg/bmake.html"
-arch="all"
+arch=""
 license="BSD"
 subpackages="$pkgname-doc"
 source="http://www.crufty.net/ftp/pub/sjg/bmake-$pkgver.tar.gz