Fix quoting on iOS VPX_LDFLAGS for latest changes
Fix quoting on iOS VPX_LDFLAGS for latest changes

This gets quoted later, so don't quote it first.

Signed-off-by: Felix Paul Kühne <af44a38b4065def9b90f0b66e4658837dd45b77d@videolan.org>
(cherry picked from commit 94bb3d34edf6b8d5c1163a35fe9517f799824eae)

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2