#1293 support build on illumos

[Alexander Pyhalov]

libmtp needs two patches to build correctly on Solaris/illumos systems. First one is related to the fact that on illumos there's no bswap_16, but there is BSWAP_16. The second is configure problem - when it checks for libusb with AC_CHECK_LIB([usb], [usb_open]..) statement, it doesn't set LIBUSB_LIBS.

[Reverend Homer]

I'm afraid that we cannot apply the first patch now, because gphoto2-endian.h is the generated file that is not added to git.
Look at byteorder.m4, please, and patch it, if you can. Or I can try to do it

[Alexander Pyhalov]

I've tried the following patch. When it's applied, I can remove gphoto2-endian.h, and it's regenerated correctly. I'm not fluent in m4, so please recheck that I haven't broken something. The following code is generated:
/ Define generic byte swapping functions /
#include <sys byteorder.h="">
#define swap16(x) BSWAP_16(x)
#define swap32(x) BSWAP_32(x)
#define swap64(x) BSWAP_64(x)