Update to v0.10.2 release of chaintool

v0.10.2 removes the old base64 encoding in favor of taking advantage
of the new (for v1.0) binary transport.  This is an ABI-breaking
change from v0.6 to v1.0 (as are many others) so important to
get this in sooner rather than later.

hyperledger-archives/fabric-chaintool@b579a6a

Change-Id: I2b96ac73efd4b6f373589d37304b7ccc2ac197d2
Signed-off-by: Gregory Haskins <gregory.haskins@gmail.com>

Makefile

@@ -48,7 +48,7 @@ PKGNAME = github.com/$(PROJECT_NAME)
 GO_LDFLAGS = -X $(PKGNAME)/common/metadata.Version=$(PROJECT_VERSION)
 CGO_FLAGS = CGO_CFLAGS=" "
 ARCH=$(shell uname -m)
-CHAINTOOL_RELEASE=v0.10.1
+CHAINTOOL_RELEASE=v0.10.2
 BASEIMAGE_RELEASE=$(shell cat ./.baseimage-release)
 
 CHAINTOOL_URL ?= https://github.com/hyperledger/fabric-chaintool/releases/download/$(CHAINTOOL_RELEASE)/chaintool