Traditionally, framework bundles have title case names such as
CoreFoundation.framework and UIKIt.framework.
gomobile bind should generate framework bundles named similarly,
following this convention.
Change-Id: Ia6082ed351ddc6fc97e0435e24e5f79c5afbaea4
Reviewed-on: https://go-review.googlesource.com/15330
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>