cmake: Add post-build scripts requirements

Some targets have post-build scripts which have additional Python
library requirements. List out the possibly required dependencies in
tools/cmake/requirements.txt. When all tools/cmake/requirements.txt are
installed, it should be less common to run into difficult to understand
error messages.

Author: Patater

tools/cmake/requirements.txt

@@ -2,3 +2,5 @@ prettytable==0.7.2
 future==0.16.0
 Jinja2>=2.10.1,<2.11
 intelhex>=2.3.0,<3.0.0
+cbor>=1.0.0
+Click>=7.0,<7.1