Update valgrind suppressions

[PaulPrice]

BPO	34377
Nosy	@benjaminp, @miss-islington, @PaulPrice
PRs	bpo-34377: update valgrind suppressions #8729 [3.7] closes bpo-34377: Update Valgrind suppressions. (GH-8729) #8733 [3.6] closes bpo-34377: Update Valgrind suppressions. (GH-8729) #8734

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2018-08-11.06:41:38.001>
created_at = <Date 2018-08-10.18:54:25.890>
labels = ['type-feature']
title = 'Update valgrind suppressions'
updated_at = <Date 2018-08-11.21:07:54.873>
user = 'https://github.com/PaulPrice'

bugs.python.org fields:

activity = <Date 2018-08-11.21:07:54.873>
actor = 'benjamin.peterson'
assignee = 'none'
closed = True
closed_date = <Date 2018-08-11.06:41:38.001>
closer = 'benjamin.peterson'
components = ['Demos and Tools']
creation = <Date 2018-08-10.18:54:25.890>
creator = 'Paul Price'
dependencies = []
files = []
hgrepos = []
issue_num = 34377
keywords = ['patch']
message_count = 4.0
messages = ['323385', '323405', '323406', '323422']
nosy_count = 3.0
nosy_names = ['benjamin.peterson', 'miss-islington', 'Paul Price']
pr_nums = ['8729', '8733', '8734']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue34377'
versions = ['Python 3.6']

[PaulPrice]

I've found that the valgrind suppressions don't work for me with cpython 3.6.2. Renaming PyObject_Free/PyObject_Realloc to _PyObject_Free/_PyObject_Realloc in the suppressions file works.

I've got a patch that I'll put in via a GitHub PR.

[benjaminp]

New changeset db6075a by Benjamin Peterson (Paul Price) in branch 'master':
closes bpo-34377: Update Valgrind suppressions. (GH-8729)
db6075a

[miss-islington]

New changeset 39c1253 by Miss Islington (bot) in branch '3.7':
closes bpo-34377: Update Valgrind suppressions. (GH-8729)
39c1253

[benjaminp]

New changeset fe62d36 by Benjamin Peterson (Miss Islington (bot)) in branch '3.6':
closes bpo-34377: Update Valgrind suppressions. (GH-8734)
fe62d36