d/control, d/rules: Disable gjs-based tests on armel

It's looking as though mozjs102, and therefore the next gjs release,
will not support armel due to its lack of atomic instructions.

debian/control

@@ -20,7 +20,7 @@ Build-Depends:
  e2fslibs-dev,
  elfutils,
  fuse3,
- gjs [!alpha !hppa !ia64 !m68k !s390x !sh4 !sparc64 !x32],
+ gjs [!alpha !armel !hppa !ia64 !m68k !s390x !sh4 !sparc64 !x32],
  gnupg <!nocheck>,
  gobject-introspection,
  gtk-doc-tools <!nodoc>,
@@ -191,7 +191,7 @@ Depends:
  cpio,
  fuse3,
  gir1.2-ostree-1.0,
- gjs [!alpha !hppa !ia64 !m68k !sh4 !sparc64 !x32],
+ gjs [!alpha !armel !hppa !ia64 !m68k !sh4 !sparc64 !x32],
  gnupg,
  ostree,
  python3,