nx-X11/extras/Mesa.patches_6.4.2/4002_no-special-glx-memfunctions.patch: include stdlib.h and string.h for memset, malloc and free prototypes.

Without that they are only implicitly defined - leading to build
failures on *SUSE.

Mesa.patches: Add 5001_nasty-typo-fixes.patch. Fix some nasty typos in Mesa's code ending up in the nxagent binary.

Mesa.patches: Disable 4001_Fix-non-working-GLX-in-64bit-Xorg-7.0.patch. It patches a file, we don't build and that we remove in roll-tarball.sh.

Mesa.patches: Have Mesa.patches_6.4.2 rather as a copy than as a symlink to Mesa.patches_6.4.1. Rebase 4004_define-USE_IEEE-macro-for-more-platforms.patch against Mesa 6.4.2 while being at it.