fix lint errors

Summary:
Changelog: [Internal][Yoga] Fixed lint errors

```arc lint --apply-patches --take CLANGFORMAT --paths-cmd 'hg files xplat/yoga'
```
Added .clang-tidy file

Reviewed By: zertosh

Differential Revision: D19948702

fbshipit-source-id: f77a16d6f2c532267597a84a9caded0aae68c3aa

YogaKit/Source/UIView+Yoga.m

@@ -5,32 +5,30 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#import <objc/runtime.h>
 #import "UIView+Yoga.h"
 #import "YGLayout+Private.h"
-#import <objc/runtime.h>
 
-static const void *kYGYogaAssociatedKey = &kYGYogaAssociatedKey;
+static const void* kYGYogaAssociatedKey = &kYGYogaAssociatedKey;
 
 @implementation UIView (YogaKit)
 
-- (YGLayout *)yoga
-{
-  YGLayout *yoga = objc_getAssociatedObject(self, kYGYogaAssociatedKey);
+- (YGLayout*)yoga {
+  YGLayout* yoga = objc_getAssociatedObject(self, kYGYogaAssociatedKey);
   if (!yoga) {
     yoga = [[YGLayout alloc] initWithView:self];
-    objc_setAssociatedObject(self, kYGYogaAssociatedKey, yoga, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    objc_setAssociatedObject(
+        self, kYGYogaAssociatedKey, yoga, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
   }
 
   return yoga;
 }
 
-- (BOOL)isYogaEnabled
-{
+- (BOOL)isYogaEnabled {
   return objc_getAssociatedObject(self, kYGYogaAssociatedKey) != nil;
 }
 
-- (void)configureLayoutWithBlock:(YGLayoutConfigurationBlock)block
-{
+- (void)configureLayoutWithBlock:(YGLayoutConfigurationBlock)block {
   if (block != nil) {
     block(self.yoga);
   }