Update swift-protobuf to 0.9.901

Examples/Echo/PackageManager/Makefile

@@ -7,3 +7,4 @@ all:
 clean :
 	rm -rf Packages
 	rm -rf .build
+	rm Package.pins

Examples/Echo/PackageManager/Package.swift

@@ -35,6 +35,6 @@ let package = Package (
     name: "Echo",
     dependencies: [
         .Package(url: "https://github.com/grpc/grpc-swift.git", Version(0,1,10)),
-        .Package(url: "https://github.com/apple/swift-protobuf.git", Version(0,9,29)),
+        .Package(url: "https://github.com/apple/swift-protobuf.git", Version(0,9,901)),
     ]
 )

Makefile

@@ -16,3 +16,4 @@ clean:
 	rm -rf Packages
 	rm -rf .build
 	rm -rf SwiftGRPC.xcodeproj
+	rm -rf Package.pins

Plugin/Makefile

@@ -21,4 +21,4 @@ clear :
 	rm -f echo.client.pb.swift echo.server.pb.swift swiftgrpc.log
 
 clean : clear
-	rm -rf protoc-gen-swiftgrpc Packages .build protoc-gen-swift
+	rm -rf protoc-gen-swiftgrpc Packages .build protoc-gen-swift Package.pins

Plugin/Package.swift

@@ -42,7 +42,7 @@ let package = Package(
     Target(name: "TemplateEncoder")
   ],
   dependencies: [
-    .Package(url: "https://github.com/apple/swift-protobuf.git", Version(0,9,29)),
+    .Package(url: "https://github.com/apple/swift-protobuf.git", Version(0,9,901)),
     .Package(url: "https://github.com/timburks/Stencil.git", Version(0,8,1))
   ]
 )