Bug 1357562 - Prevent windows clang builds from being replaced by an artifact build. r=nalexander

These builds do not have a distinct variant and they do not have an artifact
build equivalent, so specify this in their respective mozharness configs.

MozReview-Commit-ID: CHMglUoP8LR

--HG--
extra : rebase_source : a82323616c8266a6e7d4d82fde0da441da3cc3f3

testing/mozharness/configs/builds/releng_sub_windows_configs/32_stat_and_debug.py

@@ -41,5 +41,6 @@ clang.manifest",
     },
     'src_mozconfig': 'browser/config/mozconfigs/win32/debug-static-analysis',
     'purge_minsize': 9,
+    'artifact_flag_build_variant_in_try': None,
     #######################
 }

testing/mozharness/configs/builds/taskcluster_firefox_win32_clang.py

@@ -89,5 +89,6 @@ config = {
     'enable_pymake': True,
     'src_mozconfig': 'browser\\config\\mozconfigs\\win32\\clang',
     'tooltool_manifest_src': 'browser\\config\\tooltool-manifests\\win32\\clang.manifest',
+    'artifact_flag_build_variant_in_try': None,
     #########################################################################
 }

testing/mozharness/configs/builds/taskcluster_firefox_win32_clang_debug.py

@@ -91,5 +91,6 @@ config = {
     'enable_pymake': True,
     'src_mozconfig': 'browser\\config\\mozconfigs\\win32\\clang-debug',
     'tooltool_manifest_src': 'browser\\config\\tooltool-manifests\\win32\\clang.manifest',
+    'artifact_flag_build_variant_in_try': None,
     #########################################################################
 }

testing/mozharness/configs/builds/taskcluster_firefox_win64_clang.py

@@ -85,5 +85,6 @@ config = {
     'enable_pymake': True,
     'src_mozconfig': 'browser\\config\\mozconfigs\\win64\\clang',
     'tooltool_manifest_src': 'browser\\config\\tooltool-manifests\\win64\\clang.manifest',
+    'artifact_flag_build_variant_in_try': None,
     #########################################################################
 }

testing/mozharness/configs/builds/taskcluster_firefox_win64_clang_debug.py

@@ -87,5 +87,6 @@ config = {
     'enable_pymake': True,
     'src_mozconfig': 'browser\\config\\mozconfigs\\win64\\clang-debug',
     'tooltool_manifest_src': 'browser\\config\\tooltool-manifests\\win64\\clang.manifest',
+    'artifact_flag_build_variant_in_try': None,
     #########################################################################
 }