Unify iOS platform check

There is only one place that use condition `CMAKE_SYSTEM_NAME STREQUAL iOS`.
All other `if` command use just IOS.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a02b71a..c725814 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -488,7 +488,7 @@ include(cmake/OpenCVModule.cmake)
 #  Detect endianness of build platform
 # ----------------------------------------------------------------------------
 
-if(CMAKE_SYSTEM_NAME STREQUAL iOS)
+if(IOS)
   # test_big_endian needs try_compile, which doesn't work for iOS
   # http://public.kitware.com/Bug/view.php?id=12288
   set(WORDS_BIGENDIAN 0)