Squashed 'lib/mbedtls/external/mbedtls/' content from commit 2ca6c285a0dd

git-subtree-dir: lib/mbedtls/external/mbedtls
git-subtree-split: 2ca6c285a0dd3f33982dd57299012dacab1ff206
diff --git a/3rdparty/Makefile.inc b/3rdparty/Makefile.inc
new file mode 100644
index 0000000..70f316b
--- /dev/null
+++ b/3rdparty/Makefile.inc
@@ -0,0 +1,3 @@
+THIRDPARTY_DIR := $(dir $(lastword $(MAKEFILE_LIST)))
+include $(THIRDPARTY_DIR)/everest/Makefile.inc
+include $(THIRDPARTY_DIR)/p256-m/Makefile.inc