Log Message:
Update glib2 to 2.48.2

Overview of changes in GLib 2.48.2
==================================

Bugs fixed:
 547200 g_utf8_find_next_char() issues
 673101 resource compiler dependency generation not working for generated files
 700756 GFile.new_for_path arguments misses (type filename) annotation
 725902 build: simplify dtrace configuration
 728207 gsocketservice: Documentation does not mention that is already active...
 730187 glocalfileoutputstream: Fix an FD leak in an error path
 746685 Doc: clarify that g_variant_get_data() can be used instead of g_varia...
 750257 GSettings changed signal should clearly state the order required
 753231 Memory is potentially used after free
 755439 Memory leak in gdbusproxy.c
 760115 gtestutils: add missing dash in seed argument's --help documentation
 760423 gio-querymodules prints error messages as question marks on some locales
 761810 gio: Support using GDBusObjectManagerServer at path /
 766211 Fix the upper bound in g_unichar_iswide_bsearch
 766899 Superflous HTML/XML comments
 766933 GSocketAddress leaks in gnetworkmonitornetlink.c:read_netlink_messages()
 767172 docs: Move GIO_USE_VFS to "okay for production" section
 767218 Remove a UTF-8 ellipsis from gsignal.h
 767824 Some UTC timezones incorrectly recognized on Windows 7
 767949 Typos in glib docs
 768453 Gdbus test: compilation fails due to -Werror=format-y2k errors
 768504 keyfile: g_key_file_get_double behavior doesn't follow documentation
 768551 Test failure: test_socket_address_to_string
 768560 gio/tests/gsettings: fix GSettings reference leaks in some tests
 768806 gdbus tool must swallow -- argument
 769027 Docs misleadingly imply G_CHECKSUM_SHA512 is available since 2.16

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