operator.make: build operator-sdk binary from source

Released operator-sdk binary does not work for us, that needs below
fixes:
operator-framework/operator-sdk#3787
operator-framework/operator-sdk#3786

So, as interim solution, we build it from patched source.

operator/operator.make

@@ -3,9 +3,17 @@ OPERATOR_SDK_VERSION=v1.0.0
 # download operator-sdk binary
 _work/bin/operator-sdk-$(OPERATOR_SDK_VERSION):
 	mkdir -p _work/bin/ 2> /dev/null
-	curl -L https://github.com/operator-framework/operator-sdk/releases/download/$(OPERATOR_SDK_VERSION)/operator-sdk-$(OPERATOR_SDK_VERSION)-x86_64-linux-gnu -o $(abspath $@)
+#	Building operator-sdk from sources as that needs below fixes:
+#     https://github.com/operator-framework/operator-sdk/pull/3787
+#     https://github.com/operator-framework/operator-sdk/pull/3786
+#   curl -L https://github.com/operator-framework/operator-sdk/releases/download/$(OPERATOR_SDK_VERSION)/operator-sdk-$(OPERATOR_SDK_VERSION)-x86_64-linux-gnu -o $(abspath $@)
+	tmpdir=`mktemp -d` && \
+	trap 'set -x; rm -rf $$tmpdir' EXIT && \
+	git clone --branch 1.0.0+fixes https://github.com/avalluri/operator-sdk.git $$tmpdir && \
+	cd $$tmpdir && $(MAKE) build/operator-sdk && \
+	cp $$tmpdir/build/operator-sdk $(abspath $@) && \
 	chmod a+x $(abspath $@)
-	$(shell cd _work/bin/; ln -sf operator-sdk-$(OPERATOR_SDK_VERSION) operator-sdk)
+	cd $(dir $@); ln -sf operator-sdk-$(OPERATOR_SDK_VERSION) operator-sdk
 
 # Re-generates the K8S source. This target is supposed to run
 # upon any changes made to operator api.