Pullup additional patches requested by mrg in ticket #308:

xsrc/external/mit/xorg-server/dist/exa/exa_render.c	1.2
xsrc/external/mit/xorg-server/dist/render/picture.h	1.2

	fixes for CVE CVE-2013-6424:
	If t->bottom is close to MIN_INT, removing top can wraparound, so do
	the check properly.
Apply patch (requested by mrg in ticket 339):
Update libdrm to 2.4.58.
Pull up following revision(s) (requested by mrg in ticket #339):
	external/mit/xf86-video-intel/dist/src/sna/kgem.c: patch
	external/mit/xf86-video-nv/dist/src/nv_driver.c: revision 1.6
	external/mit/xf86-video-radeonhd/dist/src/rhd_video.h: revision 1.2
	external/mit/xf86-video-radeonhd/dist/src/r6xx_accel.h: revision 1.2
Nuke bogus redefinitions of uint32/64_t.
Fix format strings for uint32_t.