first cut at making iOS work

Replace __arm__ with SK_CPU_ARM
add support for iOS simulator and device
fix const warning in iOSSampleApp
update gyp files

https://code.google.com/p/skia/issues/detail?id=900
tracks fixing missing arm assembly
Review URL: https://codereview.appspot.com/6552045

git-svn-id: http://skia.googlecode.com/svn/trunk@5606 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/iOSSampleApp/Shared/SkOptionsTableViewController.h b/experimental/iOSSampleApp/Shared/SkOptionsTableViewController.h
index 2c9f391..13d6c1b 100644
--- a/experimental/iOSSampleApp/Shared/SkOptionsTableViewController.h
+++ b/experimental/iOSSampleApp/Shared/SkOptionsTableViewController.h
@@ -29,8 +29,8 @@
 @property (nonatomic, retain) SkOptionListItem* fCurrentList;
 
 - (void)registerMenus:(const SkTDArray<SkOSMenu*>*)menus;
-- (void)updateMenu:(const SkOSMenu*)menu;
-- (void)loadMenu:(const SkOSMenu*)menu;
+- (void)updateMenu:(SkOSMenu*)menu;
+- (void)loadMenu:(SkOSMenu*)menu;
 
 - (UITableViewCell*)createAction:(NSString*)title;
 - (UITableViewCell*)createSlider:(NSString*)title min:(float)min max:(float)max default:(float)value;