oci-runtime-tools: fix 32bit ARM build

With oe-core commit c23f9e80492e4b [tcmode-default: use
go-binary-native by default], we must explictly call the proper
cross go binary, versus just the go-native variant.

These builds were working by luck, since the go compiler was capable
of building the target binaries previously (in its build-from-source
creation). We fixup the calls and we no longer see fpu build issues:

 fatal error: gnu/stubs-soft.h: No such file or directory

    7 | # include <gnu/stubs-soft.h>
      |           ^~~~~~~~~~~~~~~~~~

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

recipes-containers/oci-runtime-tools/files/0001-build-use-for-cross-compiler.patch

@@ -0,0 +1,31 @@
+From b4ad9b2a57d6c736870657c06959ccc44b578f12 Mon Sep 17 00:00:00 2001
+From: Bruce Ashfield <bruce.ashfield@gmail.com>
+Date: Tue, 30 Jun 2020 23:47:08 -0400
+Subject: [PATCH] build: use  for cross compiler
+
+Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
+---
+ a/src/import/Makefile | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/import/Makefile a/src/import/Makefile
+index 77626d2..c3a0760 100644
+--- a/src/import/Makefile
++++ a/src/import/Makefile
+@@ -8,11 +8,11 @@ COMMIT=$(shell git rev-parse HEAD 2> /dev/null || true)
+ all: tool runtimetest
+ 
+ tool:
+-	go build -tags "$(BUILDTAGS)" -ldflags "-X main.gitCommit=${COMMIT}" -o oci-runtime-tool ./cmd/oci-runtime-tool
++	${GO} build -tags "$(BUILDTAGS)" -ldflags "-X main.gitCommit=${COMMIT}" -o oci-runtime-tool ./cmd/oci-runtime-tool
+ 
+ .PHONY: runtimetest
+ runtimetest:
+-	CGO_ENABLED=0 go build -installsuffix cgo -tags "$(BUILDTAGS)" -o runtimetest ./cmd/runtimetest
++	CGO_ENABLED=0 ${GO} build -installsuffix cgo -tags "$(BUILDTAGS)" -o runtimetest ./cmd/runtimetest
+ 
+ .PHONY: man
+ man:
+-- 
+2.19.1
+

recipes-containers/oci-runtime-tools/oci-runtime-tools_git.bb

@@ -5,6 +5,7 @@ LIC_FILES_CHKSUM = "file://src/import/LICENSE;md5=b355a61a394a504dacde901c958f66
 
 SRC_URI = "git://github.com/opencontainers/runtime-tools.git \
            file://0001-Revert-implement-add-set-function-for-hooks-items.patch \
+           file://0001-build-use-for-cross-compiler.patch \
            "
 
 SRCREV = "6e7da8148f4de2c9e9c9d3b345576898d4f412cb"