Update aprotoc prebuilts.

From external/protobuf commit dc5bca2a39a33e90efc447a298e8244848c3ebf1

Change-Id: Ic181a1c268baaf46cc49be13dd037670314d958d
diff --git a/darwin-x86/protobuf/aprotoc b/darwin-x86/protobuf/aprotoc
index 8020490..9f927a3 100755
--- a/darwin-x86/protobuf/aprotoc
+++ b/darwin-x86/protobuf/aprotoc
Binary files differ
diff --git a/linux-x86/protobuf/aprotoc b/linux-x86/protobuf/aprotoc
index 21280b9..d5da2f5 100755
--- a/linux-x86/protobuf/aprotoc
+++ b/linux-x86/protobuf/aprotoc
Binary files differ
diff --git a/windows/protobuf/aprotoc.exe b/windows/protobuf/aprotoc.exe
index c9e04f8..3ea3275 100755
--- a/windows/protobuf/aprotoc.exe
+++ b/windows/protobuf/aprotoc.exe
Binary files differ