curl: unset MAGIC and disable silent rules

- Unset MAGIC because configure is using /bin/file instead finding file
  from the PATH. We cannot use magic file with a different version of
  file executable.

- We want to see compilation lines, thus disable silent rules.

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>

curl.spec

@@ -12,8 +12,11 @@ case %{cmsplatf} in
   *) KERBEROS_ROOT=/usr ;;
 esac
 
+unset MAGIC
+
 ./configure \
   --prefix=%{i} \
+  --disable-silent-rules \
   --disable-static \
   --without-libidn \
   --disable-ldap \