[Bug]: xqc_build.sh is ambiguous, and may cause unexpected compile failures

[Luffbee]

What happened?

The name of xqc_build.sh makes people think it's used to build (on any platform).
Worse yet, IT MODIFIES CMakeList.txt even if it fails, which is hard to notice.
Then the modified CMakeList.txt will cause compile failures later even if people find the right way to build.

Steps To Reproduce

run xqc_build.sh first, then follow README to build.

Relevant log output

No response

[nixwl]

Hello !
I had run xqc_build.sh first,then follow README to build, after I run xqc_build.sh , shell shows:

use default ssl path: /home/nixwl/desktop/xquic/third_party/boringssl
ssl environment not exists

but when i run ./scripts/xquic_test.sh , i fails, this is the problem:
-- Could NOT find SSL (missing: SSL_LIBRARY_STATIC CRYPTO_LIBRARY_STATIC)