Add OpenRISC support

This patch adds support for the OpenRISC architecture.
(http://opencores.org/or1k/Main_Page)

This patch has been tested under Linux with QEMU-user emulation support.
- 32 Bit
- big endian
- delayed instructions
This is the only available configuration under Linux.

The description of the ABI can be found on the official website.

Is passes the testsuite except of the unwindtest_ffi_call.cc
testcase, which seems to be a problem of gcc and not libffi.
Some testcases of the gcc testsuite still fail.

Signed-off-by: Sebastian Macke <sebastian@macke.de>

configure.ac

@@ -230,6 +230,10 @@ case "$host" in
 	TARGET=NIOS2; TARGETDIR=nios2
 	;;
 
+  or1k*-linux*)
+	TARGET=OR1K; TARGETDIR=or1k
+	;;
+
   powerpc*-*-linux* | powerpc-*-sysv*)
 	TARGET=POWERPC; TARGETDIR=powerpc
 	HAVE_LONG_DOUBLE_VARIANT=1
@@ -312,6 +316,7 @@ AM_CONDITIONAL(MICROBLAZE, test x$TARGET = xMICROBLAZE)
 AM_CONDITIONAL(METAG, test x$TARGET = xMETAG)
 AM_CONDITIONAL(MOXIE, test x$TARGET = xMOXIE)
 AM_CONDITIONAL(NIOS2, test x$TARGET = xNIOS2)
+AM_CONDITIONAL(OR1K, test x$TARGET = xOR1K)
 AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
 AM_CONDITIONAL(POWERPC_AIX, test x$TARGET = xPOWERPC_AIX)
 AM_CONDITIONAL(POWERPC_DARWIN, test x$TARGET = xPOWERPC_DARWIN)