meson: fix test dependencies on rauc binary

The tests lack a dependency on building the rauc binary.
As a result, the tests will fail when running them directly from a fresh
build directory:

  meson setup build
  meson test -C build

Fix this by defining the missing dependency for both the C-based and
pytest-based tests.

Signed-off-by: Enrico Joerns <ejo@pengutronix.de>

meson.build

@@ -192,7 +192,7 @@ librauc = static_library('rauc',
   dependencies : rauc_deps + [versiondep],
   )
 
-executable('rauc',
+rauc_binary = executable('rauc',
   'src/main.c',
   dbus_sources,
   include_directories : incdir,

test/meson.build

@@ -54,6 +54,7 @@ foreach test_name : tests
   test(
     test_name,
     exe,
+    depends : rauc_binary,
     is_parallel : false,
     timeout : 240,
     protocol: 'tap',
@@ -92,6 +93,7 @@ if pytest.found()
       pytest,
       args: ['--basetemp', '/tmp/pytest-custom-root', '-vv', test_name + '.py'],
       env: ['MESON_BUILD_DIR=' + rauc_build_root],
+      depends : rauc_binary,
       is_parallel : false,
       timeout : 120,
       workdir : meson.current_source_dir(),