Fixed spelling of test name: builtins-multipercision.c => builtins-multiprecision.c.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172343 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/builtins-multipercision.c b/test/CodeGen/builtins-multiprecision.c
similarity index 100%
rename from test/CodeGen/builtins-multipercision.c
rename to test/CodeGen/builtins-multiprecision.c