Updating clang_patch script to only check files modified by current PR

.ci/clang_patch

@@ -1,7 +1,10 @@
 #!/bin/bash
 
-find . -iname *.h -o -iname *.c -o -iname *.cpp -o -iname *.hpp \
-    | xargs clang-format -style=file -i -fallback-style=none
+#find . -iname *.h -o -iname *.c -o -iname *.cpp -o -iname *.hpp \
+fileList=`git --no-pager diff --name-only HEAD master | grep ".\.c$\|.\.h$"`
+for f in $fileList; do
+   clang-format -style=file -i ${f}
+done
 
 git diff > clang_format.patch