Convert sbase with inline building instructions

For packages in base, we will ignore make/autoconf.  We can just use
inlined build instructions in the mk recipe.

pkgs/sbase

@@ -1,7 +1,23 @@
 git="git://git.2f30.org/sbase"
 
 build: crossmusl
+	set -x
 	cd src/sbase
-	make clean
-	make -j$nprocs CC=$CC LDFLAGS="$LDFLAGS"
-	make PREFIX="$root" install
+	for f in util/*.c; do
+		$CC -c $f -o "${f%%.c}.o" $CFLAGS
+	done
+	for f in util/*.o; do
+		ar -r -c util.a $f
+	done
+	ranlib util.a
+	for f in *.c; do
+		$CC -c $f $CFLAGS
+	done
+	for f in *.o; do
+		$CC -o "${f%.*}" $f util.a $LDFLAGS
+	done
+	mkdir -p "$root/share/man/man1"
+	for f in *.o; do
+		cp "${f%.*}" "$root/bin"
+		cp "${f%%.o}.1" "$root/share/man/man1"
+	done