[TIMOB-8965] MobileWeb: Analytics does not have platform information

Steps To Reproduce: 1. Create a mobile web application 2. Run the application and view the analytics Actual: ti.start does not report the platform {"city":"Mountain View","region_code":"CA","country_code":"US","country_name":"United States","postal_code":"","latitude":37.397399902344,"longitude":-122.07319641113,"area_code":650,"continent_code":"NA","ip_address":"38.99.10.124","region_name":"California","id":"42A4178D-E735-4991-82AB-66913CC865F5","mid":"CA98AA18-6663-4150-8AAA-61753014FCD5","rdu":null,"type":"ti.start","aguid":"06320706-065d-4773-9bb2-3f16e9c2fa8a","event":"ti.start","seq":1,"ver":"2","deploytype":"production","sid":"2E2006CF-807B-40FC-8A0F-4F099977FE52","ts":"2012-05-02T01:08:38.280+0420","data":"{\"tz\":420,\"deploytype\":\"production\",\"os\":\"mobileweb\",\"osver\":\"MacIntel\",\"un\":null,\"nettype\":null}"} Expected: {\"app_name\":\"Analytic20Test\",\"oscpu\":1,\"mac_addr\":null,\"deploytype\":\"production\",\"ostype\":\"mobileweb\",\"osarch\":null,\"app_id\":\"Analytic20Test\",\"platform\":\"mobileweb\",\"model\":\"Mozilla\/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit\/534.52.7 (KHTML, like Gecko) Version\/5.1.2 Safari\/534.52.7\"}"}