Revert "Makefile: do not check docker hashes for cross-compilers"

Now that all packages are bumping to the same pkg/alpine version, we
don't need to exclude pkg/cross-compilers anymore.

This reverts commit 82bd49d.

Signed-off-by: Renê de Souza Pinto <[email protected]>

Author: rene

Makefile

@@ -488,7 +488,7 @@ $(DOCKERFILE_FROM_CHECKER): $(DOCKERFILE_FROM_CHECKER_DIR)/*.go $(DOCKERFILE_FRO
 # this next section checks that the FROM hashes for any image in any dockerfile anywhere here are consistent.
 # For example, one Dockerfile has foo:abc and the next has foo:def, it will flag them.
 # These are the packages that we are ignoring for now
-IGNORE_DOCKERFILE_HASHES_PKGS=alpine installer cross-compilers
+IGNORE_DOCKERFILE_HASHES_PKGS=alpine installer
 IGNORE_DOCKERFILE_HASHES_EVE_TOOLS=bpftrace-compiler
 
 IGNORE_DOCKERFILE_DOT_GO_DIR=$(shell find .go/ -name Dockerfile -exec echo "-i {}" \;)