unix: fix mkall.sh and mksyscall.pl

Each language has its own operators.

Change-Id: I765d4d56aeafe693d22914de7ee970d7b1928a25
Reviewed-on: https://go-review.googlesource.com/41832
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/mkall.sh

@@ -45,7 +45,7 @@ case "$#" in
 	exit 2
 esac
 
-if [[ "$GOOS" -eq "linux" ]] && [[ "$GOARCH" != "sparc64" ]]; then
+if [[ "$GOOS" = "linux" ]] && [[ "$GOARCH" != "sparc64" ]]; then
 	# Use then new build system
 	# Files generated through docker (use $cmd so you can Ctl-C the build or run)
 	$cmd docker build --tag generate:$GOOS $GOOS

unix/mksyscall.pl

@@ -70,7 +70,7 @@ if($ARGV[0] =~ /^-/) {
 }
 
 # Check that we are using the new build system if we should
-if($ENV{'GOOS'} eq "linux" || $ENV{'GOARCH'} ne "sparc64") {
+if($ENV{'GOOS'} eq "linux" && $ENV{'GOARCH'} ne "sparc64") {
 	if($ENV{'GOLANG_SYS_BUILD'} ne "docker") {
 		print STDERR "In the new build system, mksyscall should not be called directly.\n";
 		print STDERR "See README.md\n";