Support for PC platform (#12)

* improvements for cross-platform compiling

* moved tactility-core to libs/

* splitup improvements

* remove git/gitmodules from freertos

* better platformbetter platform checks

* added build scripts

* delete mbedtls

* re-add mbedtls

* fixes and improvements

* added pc build

* simplify build scripts

* revert build scrpit

* updated builds

* fix for pc

* fix for pc

* fix for build

libs/mbedtls/tests/data_files/dir-maxpath/03.crt

@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----