ck_pr: Merge Joao's PPC32 support with some modifications.

Add PPC32 build file. Add support in configure script.

build/ck.build.ppc

@@ -0,0 +1 @@
+CFLAGS+=-m32 -D__ppc__

configure

@@ -225,9 +225,9 @@ printf "Detecting machine architecture..."
 PLATFORM=`uname -m 2> /dev/null`
 case $PLATFORM in
 	"macppc"|"Power Macintosh"|"powerpc")
-		PLATFORM=ppc32
+		PLATFORM=ppc
 		ENVIRONMENT=32
-		assert "$PLATFORM $ENVIRONMENT" "$PLATFORM $ENVIRONMENT" "unsupported"
+		LDFLAGS="-m32 $LDFLAGS"
 		;;
 	"sun4u"|"sun4v"|"sparc64")
 		PLATFORM=sparcv9

include/ck_pr.h

@@ -41,8 +41,8 @@
 #include "gcc/sparcv9/ck_pr.h"
 #elif defined(__ppc64__)
 #include "gcc/ppc64/ck_pr.h"
-#elif defined(__powerpc__)
-#include "gcc/powerpc/ck_pr.h"
+#elif defined(__ppc__)
+#include "gcc/ppc/ck_pr.h"
 #elif defined(__GNUC__)
 #include "gcc/ck_pr.h"
 #else