cmake: fix JNI configuration problem for Android samples

Some CMake 3.x (2.8.12.2 is fine) provides broken build configurations
with following build error message:
    ld: fatal error: -soname: must take a non-empty argument

Linker command line sample contains this:
"-shared -Wl,-soname, -o"

cmake/OpenCVDetectAndroidSDK.cmake

@@ -290,7 +290,7 @@ macro(add_android_project target path)
           set(android_proj_NATIVE_DEPS ${android_proj_NATIVE_DEPS} android)
         endif()
 
-        add_library(${JNI_LIB_NAME} MODULE ${android_proj_jni_files})
+        add_library(${JNI_LIB_NAME} SHARED ${android_proj_jni_files})
         target_link_libraries(${JNI_LIB_NAME} ${OPENCV_LINKER_LIBS} ${android_proj_NATIVE_DEPS})
 
         set_target_properties(${JNI_LIB_NAME} PROPERTIES