vg-suppressions: suppress more GLib-related memleaks

g_get_charset, g_get_filename_charsets, g_strerror, g_get_home_dir all
return a const char pointer. get_global_random is internally called by
g_random_int, g_random_int_range, etc.

On Arch Linux with glibc 2.26-11 and glib2 2.56.0+7+g66948ae23-1,
"call_init" is not visible in the stack trace, so replace it by "...".
It also has "possibly lost" entries due to GLib types initialization
(gobject_init -> _g_enum_types_init). Finally "g_private_set" internally
leaks after calling "g_private_get_impl".

Change-Id: Ifb2be3188add7bdd060d1e7321c8126e5924a738
Reviewed-on: https://code.wireshark.org/review/27118
Reviewed-by: Dario Lombardo <lomato@gmail.com>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>

tools/vg-suppressions

@@ -35,8 +35,41 @@
    fun:*alloc
    ...
    fun:g_get_charset
-   fun:print_stream_text_alloc
+}
+
+{
+   Glib Leak (g_get_filename_charsets)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:*alloc
    ...
+   fun:g_get_filename_charsets
+}
+
+{
+   Glib Leak (g_strerror)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:*alloc
+   ...
+   fun:g_strerror
+}
+
+{
+   Glib leak (g_get_home_dir)
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:g_get_home_dir
+}
+
+{
+   Glib leak (get_global_random) - requires glib debug symbols
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   ...
+   fun:get_global_random
+   fun:g_random_*
 }
 
 {
@@ -45,7 +78,6 @@
    match-leak-kinds: reachable
    ...
    fun:g_get_user_config_dir
-   ...
 }
 
 {
@@ -63,7 +95,7 @@
    match-leak-kinds: reachable
    fun:malloc
    ...
-   fun:g_private_get
+   fun:g_private_get*
 }
 
 {
@@ -77,12 +109,11 @@
 }
 
 {
-   Libc leak (dl_init)
+   Libc and GLib leak (dl_init)
    Memcheck:Leak
-   match-leak-kinds: reachable
    fun:*alloc
    ...
    fun:call_init.part.0
-   fun:call_init
+   ...
    fun:_dl_init
 }