Build: Generate 32-bit supplementary ppc64 .deb

As with x86-64, the Power ISA basically implements 64-bit instructions
as extensions of their 32-bit counterparts.  Thus, 64-bit Power ISA CPUs
can natively execute legacy 32-bit PowerPC instructions when running in
big-endian mode.  Most Power ISA support has shifted (pun intended) to
little-endian mode, so there are few remaining operating systems that
support big-endian mode.  Debian is one of them, however (albeit
unofficially.)

release/makedpkg.in

@@ -56,6 +56,8 @@ makedeb()
 		PKGNAME=$PKGNAME\32
 		if [ "$DEBARCH" = "i386" ]; then
 			DEBARCH=amd64
+		elif [ "$DEBARCH" = "ppc" ]; then
+			DEBARCH=ppc64
 		else
 			DEBARCH=arm64
 		fi
@@ -114,7 +116,8 @@ if [ ! `uid` -eq 0 ]; then
 fi
 
 makedeb 0
-if [ "$DEBARCH" = "i386" -o "$DEBARCH" = "armel" -o "$DEBARCH" = "armhf" ]; then
+if [ "$DEBARCH" = "i386" -o "$DEBARCH" = "armel" -o "$DEBARCH" = "armhf" -o \
+	"$DEBARCH" = "ppc" ]; then
 	makedeb 1
 fi