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/suites/test_suite_version.data

@@ -0,0 +1,15 @@
+Check compile time library version
+check_compiletime_version:"3.5.1"
+
+Check runtime library version
+check_runtime_version:"3.5.1"
+
+Check for MBEDTLS_VERSION_C
+check_feature:"MBEDTLS_VERSION_C":0
+
+Check for MBEDTLS_AES_C when already present
+depends_on:MBEDTLS_AES_C
+check_feature:"MBEDTLS_AES_C":0
+
+Check for unknown define
+check_feature:"MBEDTLS_UNKNOWN":-1