SPECS: pinentry: Align GNOME build condition

[Jingwiw]

Changes

• Add the missing remote asset checksum, drop the unused signature source, and keep the local wrapper as Source1.

• Make the GNOME3 pinentry configure option follow %bcond gnome.

  The spec defaults %bcond gnome 0, and the pkgconfig(gcr-4) BuildRequires, subpackage, and files are already guarded by %{with gnome}. The old configure flags still always requested --enable-pinentry-gnome3, so a build environment with gcr available could enable GNOME3 support despite the bcond default.

  Source: pinentry-1.3.2/configure.ac:435-480

  AC_ARG_ENABLE(pinentry-gnome3,
              AS_HELP_STRING([--enable-pinentry-gnome3],[build GNOME 3 pinentry]),
              pinentry_gnome_3=$enableval, pinentry_gnome_3=maybe)
  
  if test "$pinentry_gnome_3" != "no"; then
          PKG_CHECK_MODULES(
                  GNOME3,
                  [gcr-4],
                  [
                          pinentry_gnome_3=yes
                  ],
                  [PKG_CHECK_MODULES(
                          GNOME3,
                          [gcr-base-3],
                          [
                                  pinentry_gnome_3=yes
                          ],
                          [
                                  AC_MSG_WARN([pkg-config could not find the module gcr-4 or gcr-base-3])
                                  pinentry_gnome_3=no
                          ]
                  )]
          )
  fi
  
  AM_CONDITIONAL(BUILD_PINENTRY_GNOME_3, test "$pinentry_gnome_3" = "yes")

AIGC Declaration: CodeX with gpt5.5 was used as coding agent.

Signed-off-by: Jingwiw wangjingwei@iscas.ac.cn