Updated build target and project properties to SDK 19
Fixes #1175. A small fix. This is unfortunately somewhat fragile for non-compliant devices but the fact that it is needed at all leaves little other option. The GLES spec states that the number string portion should be alone, so the colon that this fixes simply shouldnt exist. As a precaution I have also added a check for a hyphen as that seems like the only other likely violation.