misc: Adjust clang-tidy options.

.clang-tidy

···
 # SPDX-License-Identifier: CC0-1.0
 # SPDX-FileCopyrightText: 2018-2020 Collabora, Ltd. and the Monado contributors
 # Ideally we'd turn back on a few of these that are disabled near the end
-Checks:          'clang-diagnostic-*,clang-analyzer-*,performance-*,bugprone-*,cert-*,readability-*,misc-*,-modernize-*,-clang-analyzer-security.insecureAPI.strcpy,-bugprone-macro-parentheses,-readability-braces-around-statements,-misc-unused-parameters,-readability-implicit-bool-conversion,-clang-diagnostic-missing-field-initializers,-clang-diagnostic-missing-braces,-readability-uppercase-literal-suffix'
+Checks:         'clang-diagnostic-*,
+                clang-analyzer-*,
+                performance-*,
+                bugprone-*,
+                cert-*,
+                readability-*,
+                misc-*,
+                -modernize-*,
+                -clang-analyzer-security.insecureAPI.strcpy,
+                -bugprone-macro-parentheses,
+                -readability-braces-around-statements,
+                -misc-unused-parameters,
+                -readability-implicit-bool-conversion,
+                -clang-diagnostic-missing-field-initializers,
+                -clang-diagnostic-missing-braces,
+                -readability-uppercase-literal-suffix,
+                -misc-non-private-member-variables-in-classes'
 WarningsAsErrors: ''
 HeaderFilterRegex: 'src/xrt/.*'
 AnalyzeTemporaryDtors: false