mips64: add missing line-continuation character

make distclean failed for the missing character.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13416 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/none/tests/mips64/Makefile.am b/none/tests/mips64/Makefile.am
index bad22d7..96a5a21 100644
--- a/none/tests/mips64/Makefile.am
+++ b/none/tests/mips64/Makefile.am
@@ -9,7 +9,7 @@
 	arithmetic_instruction.vgtest \
 	branch_and_jump_instructions.stdout.exp \
 	branch_and_jump_instructions.stderr.exp branch_and_jump_instructions.vgtest \
-	branches.stdout.exp branches.stderr.exp branches.vgtest
+	branches.stdout.exp branches.stderr.exp branches.vgtest \
 	extract_insert_bit_field.stdout.exp-mips64 \
 	extract_insert_bit_field.stdout.exp-mips64r2 \
 	extract_insert_bit_field.stderr.exp extract_insert_bit_field.vgtest \