[PATCH] Add ios system type

[Mike Hommey]

A valid triplet for iOS looks like "armv7-apple-ios". Clang recognizes it as 
such.
---
 config.sub | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/config.sub b/config.sub
index 6223dde..6ae8755 100755
--- a/config.sub
+++ b/config.sub
@@ -1526,16 +1526,18 @@ case $os in
        -zvmoe)
                os=-zvmoe
                ;;
        -dicos*)
                os=-dicos
                ;;
        -nacl*)
                ;;
+       -ios)
+               ;;
        -none)
                ;;
        *)
                # Get rid of the `-' at the beginning of $os.
                os=`echo $os | sed 's/[^-]*-//'`
                echo Invalid configuration \`$1\': system \`$os\' not 
recognized 1>&2
                exit 1
                ;;
-- 
2.7.4