up by white space changes...
Changes:
- remove end of line white space
- fix compiler warning "ext/mysqli/mysqli_priv.h:156:27: warning: no newline at end of file"
- fix compiler warning "ext/mysqli/mysqli_fe.h:135:25: warning: no newline at end of file"
- fix compiler warning "ext/mysqli/mysqli.c:896:11: warning: extra tokens at end of #ifdef directive"