Be explicit about CGO_ENABLED=1 for compare-cap build.

It looks like go1.18 is going to default to CGO_ENABLED=0, so force
CGO_ENABLED=1 when building this cap-libcap comparison program.

Fixes:

  https://bugzilla.kernel.org/show_bug.cgi?id=215603

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
diff --git a/go/Makefile b/go/Makefile
index 4aface4..109581b 100644
--- a/go/Makefile
+++ b/go/Makefile
@@ -55,7 +55,7 @@
 # Compiles something with this package to compare it to libcap. This
 # tests more when run under sudotest (see ../progs/quicktest.sh for that).
 compare-cap: compare-cap.go CAPGOPACKAGE
-	CC="$(CC)" $(CGO_LDFLAGS_ALLOW) CGO_CFLAGS="$(CGO_CFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) build $(GO_BUILD_FLAGS) -mod=vendor $<
+	CC="$(CC)" CGO_ENABLED="1" $(CGO_LDFLAGS_ALLOW) CGO_CFLAGS="$(CGO_CFLAGS)" CGO_LDFLAGS="$(CGO_LDFLAGS)" $(GO) build $(GO_BUILD_FLAGS) -mod=vendor $<
 
 web: ../goapps/web/web.go CAPGOPACKAGE
 	CC="$(CC)" CGO_ENABLED="$(CGO_REQUIRED)" $(CGO_LDFLAGS_ALLOW) $(GO) build $(GO_BUILD_FLAGS) -mod=vendor -o $@ $<
@@ -75,7 +75,7 @@
 	CC="$(CC)" CGO_ENABLED="$(CGO_REQUIRED)" $(CGO_LDFLAGS_ALLOW) $(GO) build $(GO_BUILD_FLAGS) -mod=vendor -o $@ $<
 
 ok: ok.go
-	CC="$(CC)" CGO_ENABLED=0 $(GO) build $(GO_BUILD_FLAGS) -mod=vendor $<
+	CC="$(CC)" CGO_ENABLED="0" $(GO) build $(GO_BUILD_FLAGS) -mod=vendor $<
 
 try-launching: try-launching.go CAPGOPACKAGE ok
 	CC="$(CC)" CGO_ENABLED="$(CGO_REQUIRED)" $(CGO_LDFLAGS_ALLOW) $(GO) build $(GO_BUILD_FLAGS) -mod=vendor $<