build: use full_path() for referencing programs

When using the result of find_program, meson may expand
it to include both an interpretor path and the script
path. If we then add the interpretor path too, we fail.
Using 'full_path()' ensures we get only the script path.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

data/meson.build

@@ -50,7 +50,7 @@ if with_msi
     output: ['buildenv.txt'],
     command: [
       python3,
-      buildenv_prog,
+      buildenv_prog.full_path(),
     ],
     capture: true)
 
@@ -93,7 +93,7 @@ if with_msi
     build_by_default: false,
     command: [
       python3,
-      msitool_prog,
+      msitool_prog.full_path(),
       meson.build_root(),
       prefix,
       wixl_arch,

meson.build

@@ -512,7 +512,7 @@ configure_file(
 subdir('build-aux')
 
 if git
-  authors = run_command(python3.full_path(), gen_authors_prog, env: runutf8, check: true)
+  authors = run_command(python3.full_path(), gen_authors_prog.full_path(), env: runutf8, check: true)
   authors_file = 'AUTHORS.in'
 
   authors_conf = configuration_data()
@@ -536,8 +536,8 @@ if git
     configuration: conf_data
   )
 
-  meson.add_dist_script(python3.full_path(), dist_prog, meson.project_build_root(), 'AUTHORS')
-  meson.add_dist_script(python3.full_path(), dist_prog, meson.project_build_root(), 'virt-viewer.spec')
+  meson.add_dist_script(python3.full_path(), dist_prog.full_path(), meson.project_build_root(), 'AUTHORS')
+  meson.add_dist_script(python3.full_path(), dist_prog.full_path(), meson.project_build_root(), 'virt-viewer.spec')
 endif
 
 gnome = import('gnome')

src/meson.build

@@ -187,7 +187,7 @@ if host_machine.system() == 'windows'
     output: ['virt-viewer-rc.o'],
     command : [
       python3,
-      run_windres_prog,
+      run_windres_prog.full_path(),
       windres,
       join_paths(meson.build_root(), 'icons'),
       meson.current_source_dir(),