Fixed a typo in __config that prevented the aligned new/delete tests from passing on Mac OS.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@292822 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__config b/include/__config
index 63f477b..9585f33 100644
--- a/include/__config
+++ b/include/__config
@@ -851,7 +851,7 @@
 #if defined(__APPLE__)
 # if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
      defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
-#   define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIROMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+#   define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
 # endif
 # if defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
 #   if __MAC_OS_X_VERSION_MIN_REQUIRED < 1060