ie, the following results in the expected literal order in both cases:

$ cat testprojects/src/resources/org/pantsbuild/testproject/ordering/BUILD
SOURCES=['p', 'a', 'n', 't', 's', 'b', 'u', 'i', 'l', 'd', 'p', 'a', 'n', 't', 's']

resources(
  name='literal',
  sources=SOURCES,
)

resources(
  name='globs',
  sources=globs(*SOURCES),
)