[binutils-gdb] Code cleanup: Rename enum -> enum filterflags

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT 31b7833d205031b52996982f5da025d60c6e052f ***

Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Branch: master
Commit: 31b7833d205031b52996982f5da025d60c6e052f

Code cleanup: Rename enum -> enum filterflags
Bit mask ints are better to make enums as GDB already has support to
automatically decode them:

before this patch:
	(gdb) p filterflags
	$1 = 51
	(gdb) p/x filterflags
	$2 = 0x33

after this patch:
	(gdb) p filterflags
	$1 = (COREFILTER_ANON_PRIVATE | COREFILTER_ANON_SHARED | COREFILTER_ELF_HEADERS | COREFILTER_HUGETLB_PRIVATE)

gdb/ChangeLog
2015-06-15  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* linux-tdep.c (enum filterflags): Make it from anonymous enum.
	(dump_mapping_p): Use it for parameter filterflags.
	(linux_find_memory_regions_full): Use it for variable filterflags.