Fix codes for compiling with mbedTLS

Clean up codes. (+6 squashed commit)

Squashed commit:

[4126d9e] Update build scripts

[2ee5027] Update CMake module

[71da951] Update build scripts

[dea8d3f] Update CMake script

[92113ba] Clean up codes and update build script

scripts/config.termux.sh

@@ -15,6 +15,3 @@ git clone https://github.com/tencent/rapidjson
 cd rapidjson
 cp -r include/* /data/data/com.termux/files/usr/include/
 cd ..
-
-curl -LO https://raw.githubusercontent.com/jpcre2/jpcre2/release/src/jpcre2.hpp
-cp jpcre2.hpp /data/data/com.termux/files/usr/include/