Fix icu link after second cmake run

cmake/find_icu.cmake

-option (ENABLE_ICU "Enable ICU" ON)
+option(ENABLE_ICU "Enable ICU" ON)
 
-if (ENABLE_ICU)
-    find_package(ICU COMPONENTS data i18n uc) # TODO: remove Modules/FindICU.cmake after cmake 3.7
+if(ENABLE_ICU)
+    find_package(ICU COMPONENTS i18n uc data) # TODO: remove Modules/FindICU.cmake after cmake 3.7
     #set (ICU_LIBRARIES ${ICU_I18N_LIBRARY} ${ICU_UC_LIBRARY} ${ICU_DATA_LIBRARY} CACHE STRING "")
-    set (ICU_LIBRARIES ICU::i18n ICU::uc ICU::data CACHE STRING "")
-    if (ICU_FOUND)
+    if(ICU_FOUND)
         set(USE_ICU 1)
-    endif ()
-endif ()
+    endif()
+endif()
 
-if (USE_ICU)
-    message (STATUS "Using icu=${USE_ICU}: ${ICU_INCLUDE_DIR} : ${ICU_LIBRARIES}")
-else ()
-    message (STATUS "Build without ICU (support for collations and charset conversion functions will be disabled)")
-endif ()
+if(USE_ICU)
+    message(STATUS "Using icu=${USE_ICU}: ${ICU_INCLUDE_DIR} : ${ICU_LIBRARIES}")
+else()
+    message(STATUS "Build without ICU (support for collations and charset conversion functions will be disabled)")
+endif()