FindIntl: Use explicit find_library signature NAMES keyword

Modules/FindIntl.cmake

@@ -129,7 +129,9 @@ else()
             DOC "libintl include directory")
   mark_as_advanced(Intl_INCLUDE_DIR)
 
-  find_library(Intl_LIBRARY "intl" "libintl" NAMES_PER_DIR
+  find_library(Intl_LIBRARY
+    NAMES "intl" "libintl"
+    NAMES_PER_DIR
     DOC "libintl libraries (if not in the C library)")
   mark_as_advanced(Intl_LIBRARY)
 endif()