Fixed compiler options in Android build (Windows)

CMakeLists.txt

@@ -66,10 +66,8 @@ if(CMAKE_VERBOSE)
     set(CMAKE_VERBOSE_MAKEFILE 1)
 endif()
 
-if (WIN32)
-    if(${CMAKE_GENERATOR} MATCHES "(MinGW)|(MSYS)")
-        set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "")
-    endif()
+if (WIN32 AND ${CMAKE_GENERATOR} MATCHES "(MinGW)|(MSYS)" AND NOT ANDROID)
+    set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "")
 endif()