Fix a bug in updatefat tool affecting ppc+ppc64 fat installs

git-svn-id: https://svn.r-project.org/R/trunk@40193 00db46b3-68df-0310-9c12-caf00c1e9a41

tools/updatefat

@@ -21,7 +21,7 @@ fi
 
 #echo "architecture: $thisarch";
 if [ -e "$1" ]; then \
-    if lipo -detailed_info "$1"|grep "architecture:* $thisarch" > /dev/null; then
+    if lipo -detailed_info "$1"|grep "architecture:* $thisarch\$" > /dev/null; then
 	if lipo -info "$1"|grep ^Non-fat > /dev/null; then
 	    lipo -create "$2" -o "$1"
 	else