gnome: Actually run all mkenums_simple tests and fix numbering

Some tests for `gnome.mkenums_simple` were only compiled, but not run.
Most bugs will be caught by compilation alone, but it's better to run
the generated binary too in case there are runtime issues in the
generated code.

The naming of all enum tests is now unified as well.

test cases/frameworks/7 gnome/mkenums/meson.build

@@ -121,6 +121,7 @@ test('enum test 3', enumexe3)
 enums4 = gnome.mkenums_simple('enums4', sources : files('meson-sample.h'),
                               function_prefix : '_')
 enumexe4 = executable('enumprog4', 'main4.c', enums4, dependencies : gobj)
+test('enum test 4', enumexe4)
 
 enums5 = gnome.mkenums_simple('enums5', sources : 'meson-sample.h',
                               install_header : true,
@@ -135,6 +136,7 @@ main = configure_file(
   configuration : conf)
 
 enumexe5 = executable('enumprog5', main, enums5, dependencies : gobj)
+test('enum test 5', enumexe5)
 
 # Generate template then use as input to mkenums
 
@@ -161,7 +163,7 @@ main = configure_file(
 
 enumexe6 = executable('enumprog6', main, enums_c2, enums_h6,
 dependencies : gobj)
-test('enum test 4', enumexe6)
+test('enum test 6', enumexe6)
 
 # Test with headers coming from other directories
 # https://github.com/mesonbuild/meson/pull/10855
@@ -169,6 +171,8 @@ subdir('subdir')
 enums7 = gnome.mkenums_simple('enums7', sources: ['meson-sample.h', h2, h3])
 main = configure_file(
   input : 'main.c',
-  output : 'mai7.c',
+  output : 'main7.c',
   configuration : {'ENUM_FILE': 'enums7.h'})
-test('enums7 test', executable('enumprog7', main, enums7, dependencies : gobj))
+
+enumexe7 = executable('enumprog7', main, enums7, dependencies : gobj)
+test('enum test 7', enumexe7)