glib-2.0: upgrade 2.66.7 -> 2.68.0

the following patches are refreshed:
0001-Set-host_machine-correctly-when-building-with-mingw3.patch
0001-gio-tests-codegen.py-bump-timeout-to-100-seconds.patch
0001-tests-codegen.py-removing-unecessary-print-statement.patch
relocate-modules.patch

the following patches are removed since they are included
in 2.68.0:
0001-gobject-Drop-use-of-volatile-from-get_type-macros.patch
0002-tests-Fix-non-atomic-access-to-a-shared-variable.patch
0003-tests-Fix-non-atomic-access-to-a-shared-variable.patch
0004-tests-Drop-unnecessary-volatile-qualifiers-from-test.patch
0005-tests-Fix-non-atomic-access-to-some-shared-variables.patch
0006-tests-Drop-unnecessary-volatile-qualifiers-from-test.patch
0007-gdbusconnection-Drop-unnecessary-volatile-qualifiers.patch
0008-gdbuserror-Drop-unnecessary-volatile-qualifiers-from.patch
0009-gio-Drop-unnecessary-volatile-qualifiers-from-intern.patch
0010-kqueue-Fix-unlocked-access-to-shared-variable.patch
0011-tests-Drop-unnecessary-volatile-qualifiers-from-test.patch
0012-tests-Fix-non-atomic-access-to-some-shared-variables.patch
0013-gatomic-Drop-unnecessary-volatile-qualifiers-from-in.patch
0014-gatomic-Drop-unnecessary-volatile-qualifiers-from-ma.patch
0015-glib-Drop-unnecessary-volatile-qualifiers-from-inter.patch
0016-gobject-Drop-unnecessary-volatile-qualifiers-from-in.patch
0017-gmessages-Drop-unnecessary-volatile-qualifiers-from-.patch
0018-gtypes-Drop-volatile-qualifier-from-gatomicrefcount.patch
0019-gatomicarray-Drop-volatile-qualifier-from-GAtomicArr.patch
0020-gobject-Drop-volatile-qualifier-from-GObject.ref_cou.patch
0021-tests-Drop-unnecessary-volatile-qualifiers-from-test.patch
0022-build-Drop-unnecessary-volatile-qualifiers-from-conf.patch
0023-gdbusprivate-Avoid-a-warning-about-a-statement-with-.patch
0024-tests-Add-comment-to-volatile-atomic-tests.patch
0025-gthread-Use-g_atomic-primitives-correctly-in-destruc.patch
0026-gtype-Fix-some-typos-in-comments.patch
0027-gtype-Add-some-missing-atomic-accesses-to-init_state.patch
0028-gresource-Fix-a-pointer-mismatch-with-an-atomic-load.patch
0029-docs-Document-not-to-use-volatile-qualifiers.patch

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>