Make the boringcrypto check POSIX shell compliant

- Otherwise this fails on some of the omnibus builder images

Makefile

@@ -10,7 +10,7 @@ BUILD_TAGS := tracer_static tracer_static_jaeger continuous_profiler_stackdriver
 ifeq (${FIPS_MODE}, 1)
     # Go 1.19 now requires GOEXPERIMENT=boringcrypto for FIPS compilation.
     # See https://github.com/golang/go/issues/51940 for more details.
-    BORINGCRYPTO_SUPPORT := $(shell GOEXPERIMENT=boringcrypto go version &> /dev/null; echo $$?)
+    BORINGCRYPTO_SUPPORT := $(shell GOEXPERIMENT=boringcrypto go version > /dev/null 2>&1; echo $$?)
     ifeq ($(BORINGCRYPTO_SUPPORT), 0)
         GOBUILD_ENV=GOEXPERIMENT=boringcrypto
     endif