s/product-services/product_services/g

Attempting to reduce the number of different spellings we have for
"product services" partition in the codebase.

Bug: 112431447
Test: m
Change-Id: I6debd3f5f5abc4bd1e22f2ef11c5fe131915976c
Merged-In: I6debd3f5f5abc4bd1e22f2ef11c5fe131915976c
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index bf380bc..4195900 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -79,7 +79,7 @@
 
 # The partitions allowed to be signed by AVB (Android verified boot 2.0).
 AVB_PARTITIONS = ('boot', 'recovery', 'system', 'vendor', 'product',
-                  'product-services', 'dtbo', 'odm')
+                  'product_services', 'dtbo', 'odm')
 
 
 class ErrorCode(object):