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/freertos-kernel/portable/ThirdParty/GCC/RISC-V/README-for-info-on-official-MIT-license-port.txt

@@ -0,0 +1,6 @@
+The official and MIT licensed FreeRTOS ports for RISC-V are located in the following directories:
+\FreeRTOS\Source\portable\GCC\RISC-V
+\FreeRTOS\Source\portable\IAR\RISC-V
+
+Also so https://www.FreeRTOS.org/Using-FreeRTOS-on-RISC-V.html
+