build: use full_path() instead of path()

Fixes the following warning:

    WARNING: Project targeting '>= 0.56.0' but tried to use feature deprecated
    since '0.55.0': ExternalProgram.path. use ExternalProgram.full_path() instead

Signed-off-by: Simon Ser <contact@emersion.fr>

egl/meson.build

@@ -11,7 +11,7 @@ wayland_egl = library(
 
 executable('wayland-egl-abi-check', 'wayland-egl-abi-check.c')
 
-nm_path = find_program('nm').path()
+nm_path = find_program('nm').full_path()
 
 test(
 	'wayland-egl symbols check',

tests/meson.build

@@ -77,7 +77,7 @@ if add_languages('cpp')
 	)
 endif
 
-sed_path = find_program('sed').path()
+sed_path = find_program('sed').full_path()
 
 if get_option('scanner')
 	test(