Use fbsource clang-format config

Summary:
This mirrors the clang-format config used by fbsource to Yoga.

They are pretty similar, except for an annoying habit where Yoga's previous forced small functions in headers to be a a single line, so you would get a combination of multiline and single line functions next to each other which are hard to read. That is what motivated this change.

It also enforces header ordering (yay). I don't think we have any side-effect causing headers, so this should be safe.

Reviewed By: yungsters

Differential Revision: D49248994

fbshipit-source-id: 66998395e7c0158ff9d9fb1bee44e8401bdd8f21

tests/YGBaselineFuncTest.cpp

@@ -8,11 +8,9 @@
 #include <gtest/gtest.h>
 #include <yoga/Yoga.h>
 
-static float _baseline(
-    YGNodeConstRef node,
-    const float /*width*/,
-    const float /*height*/) {
-  float* baseline = (float*) YGNodeGetContext(node);
+static float
+_baseline(YGNodeConstRef node, const float /*width*/, const float /*height*/) {
+  float* baseline = (float*)YGNodeGetContext(node);
   return *baseline;
 }