arch/powerpc: add powerpc64le support

Technically, I don't forbid powerpcle support either, but I'm not sure that
there is any library/compiler support for that at the moment (though the hw
technically makes it possible).

powerpc64le needs glibc 2.19 and gcc 4.9. I haven't looked into the support
tools, but at least gdb 7.5 is too old (7.7.1 definitely has support).

Also make powerpc64 non-experimental. It's practically old at this point.

Signed-off-by: Cody P Schafer <dev@codyps.com>
[yann.morin.1998@free.fr: use ${target_endian_le} and ${target_bits_64}]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Message-Id: <64bfbbced9dd8f62e0d6.1399801945@gun>
Patchwork-Id: 347775

diff -dur duma_2_5_1.orig/Makefile duma_2_5_1/Makefile

--- duma_2_5_1.orig/Makefile	2007-07-11 17:49:43.000000000 +0200

+++ duma_2_5_1/Makefile	2007-07-11 17:50:46.000000000 +0200

@@ -115,9 +115,14 @@

 	dumatest.c tstheap.c dumatestpp.cpp testoperators.cpp \

 	createconf.c

-OBJECTS = dumapp.o duma.o sem_inc.o print.o

+OBJECTS = duma.o sem_inc.o print.o

+SO_OBJECTS = duma_so.o sem_inc_so.o print_so.o

+

+ifeq ($(DUMA_CPP),1)

+OBJECTS += dumapp.o

+SO_OBJECTS += dumapp_so.o

+endif

-SO_OBJECTS = dumapp_so.o duma_so.o sem_inc_so.o print_so.o

 all:	libduma.a $(DUMASO) tstheap dumatest dumatestpp testoperators tstheap_so dumatestpp_so

 	@ echo "Testing DUMA."