Build gitea1.11 with go1.13 (#10584)

Makefile

@@ -447,7 +447,7 @@ release-windows:
 	@hash xgo > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
 		$(GO) get -u src.techknowlogick.com/xgo; \
 	fi
-	xgo -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '-linkmode external -extldflags "-static" $(LDFLAGS)' -targets 'windows/*' -out gitea-$(VERSION) .
+	xgo -go go-1.13 -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '-linkmode external -extldflags "-static" $(LDFLAGS)' -targets 'windows/*' -out gitea-$(VERSION) .
 ifeq ($(CI),drone)
 	cp /build/* $(DIST)/binaries
 endif
@@ -457,7 +457,7 @@ release-linux:
 	@hash xgo > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
 		$(GO) get -u src.techknowlogick.com/xgo; \
 	fi
-	xgo -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '-linkmode external -extldflags "-static" $(LDFLAGS)' -targets 'linux/amd64,linux/386,linux/arm-5,linux/arm-6,linux/arm64,linux/mips64le,linux/mips,linux/mipsle' -out gitea-$(VERSION) .
+	xgo -go go-1.13 -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '-linkmode external -extldflags "-static" $(LDFLAGS)' -targets 'linux/amd64,linux/386,linux/arm-5,linux/arm-6,linux/arm64,linux/mips64le,linux/mips,linux/mipsle' -out gitea-$(VERSION) .
 ifeq ($(CI),drone)
 	cp /build/* $(DIST)/binaries
 endif
@@ -467,7 +467,7 @@ release-darwin:
 	@hash xgo > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
 		$(GO) get -u src.techknowlogick.com/xgo; \
 	fi
-	xgo -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '$(LDFLAGS)' -targets 'darwin/*' -out gitea-$(VERSION) .
+	xgo -go go-1.13 -dest $(DIST)/binaries -tags 'netgo osusergo $(TAGS)' -ldflags '$(LDFLAGS)' -targets 'darwin/*' -out gitea-$(VERSION) .
 ifeq ($(CI),drone)
 	cp /build/* $(DIST)/binaries
 endif