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/programs/fuzz/.gitignore

@@ -0,0 +1,10 @@
+fuzz_client
+fuzz_dtlsclient
+fuzz_dtlsserver
+fuzz_pkcs7
+fuzz_privkey
+fuzz_pubkey
+fuzz_server
+fuzz_x509crl
+fuzz_x509crt
+fuzz_x509csr