Replace usage of icu.exe by icu_windows.zip.

Author: asfernandes

builds/win32/make_icu.bat

@@ -8,7 +8,7 @@
 :: MAIN
 
 @echo Extracting pre-built ICU
-%FB_ROOT_PATH%\extern\icu\icu.exe -y > make_icu_%FB_TARGET_PLATFORM%.log 2>&1
+unzip -o %FB_ROOT_PATH%\extern\icu\icu_windows.zip -d %FB_ROOT_PATH%\extern\icu
 unzip -o %FB_ROOT_PATH%\extern\icu\icudt.zip -d %FB_ROOT_PATH%\extern\icu
 if errorlevel 1 call :ERROR build failed - see make_icu_%FB_TARGET_PLATFORM%.log for details