JNI warnings in javafx-iio

This is a part of RT-28632 moved to a separate issue:

3. (*env)->NewStringUTF(env, buffer) is called in a Get/ReleasePrimitiveArrayCritical block:

        javafx-iio.dll!sun_jpeg_output_message(jpeg_common_struct * cinfo) Line 553 + 0x18 bytes C
  javafx-iio.dll!emit_message(jpeg_common_struct * cinfo, int msg_level) Line 138 + 0xc bytes C
  javafx-iio.dll!jpeg_fill_bit_buffer(bitread_working_state * state, long get_buffer, int bits_left, int nbits) Line 500 + 0x1c bytes C
  javafx-iio.dll!decode_mcu(jpeg_decompress_struct * cinfo, short [64]* * MCU_data) Line 1067 + 0x1d bytes C
  javafx-iio.dll!decompress_onepass(jpeg_decompress_struct * cinfo, unsigned char * * * output_buf) Line 167 + 0x19 bytes C
  javafx-iio.dll!process_data_simple_main(jpeg_decompress_struct * cinfo, unsigned char * * output_buf, unsigned int * out_row_ctr, unsigned int out_rows_avail) Line 354 + 0x19 bytes C
  javafx-iio.dll!jpeg_read_scanlines(jpeg_decompress_struct * cinfo, unsigned char * * scanlines, unsigned int max_lines) Line 173 + 0x1e bytes C
  javafx-iio.dll!Java_com_sun_javafx_iio_jpeg_JPEGImageLoader_decompressIndirect(const JNINativeInterface_ * * env, _jobject * this, __int64 ptr, unsigned char report_progress, _jobject * barray) Line 1597 + 0xf bytes C