Moving out a better clang support patch
Moving to gdb 7.6

Updating Makefile and distinfo
Remove an obsolete patch (bfd-elf32-microblaze)
Moving to gdb 7.6

Remove unappliable patch (bfd/elf32-xtensa.c)
Moving to gdb 7.6

Adapting the patch-gdb-i386fbsd-tdep.c to the new code
Moving to gdb 7.6

Removed obsolete patches
* patch-opcodes-ia64-asmtab.c
* patch-opcodes-tic54x-dis.c