Integrate project njs with target njs_process_script_fuzzer

[Vaush]

No description provided.

[inferno-chromium]

Too many fuzzer failures, please check the failures

#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1135: multiple definition of `__sanitizer_cov_trace_cmp4'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1135: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__cmplog_ins_hook8':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1156: multiple definition of `__sanitizer_cov_trace_cmp8'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1156: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__cmplog_ins_hook1':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1091: multiple definition of `__sanitizer_cov_trace_const_cmp1'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1091: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__cmplog_ins_hook2':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1114: multiple definition of `__sanitizer_cov_trace_const_cmp2'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1114: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__cmplog_ins_hook4':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1135: multiple definition of `__sanitizer_cov_trace_const_cmp4'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1135: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__cmplog_ins_hook8':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1156: multiple definition of `__sanitizer_cov_trace_const_cmp8'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1156: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__sanitizer_cov_trace_pc_guard':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1027: multiple definition of `__sanitizer_cov_trace_pc_guard'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1027: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__sanitizer_cov_trace_pc_guard_init':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1042: multiple definition of `__sanitizer_cov_trace_pc_guard_init'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1042: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `__sanitizer_cov_trace_switch':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:1205: multiple definition of `__sanitizer_cov_trace_switch'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:1205: first defined here
#16 279.0 /afl/afl-compiler-rt.o: In function `send_forkserver_error':
#16 279.0 llvm_mode/instrumentation/afl-compiler-rt.o.c:141: multiple definition of `send_forkserver_error'
#16 279.0 /afl/afl-compiler-rt.o:llvm_mode/instrumentation/afl-compiler-rt.o.c:141: first defined here
#16 279.0 clang-11: error: linker command failed with exit code 1 (use -v to see invocation)

[Vaush]

@inferno-chromium
So, the build.sh tries to compile pcre as a dependence, statically. For some reason unkown to me right now, that makes it so that afl-clang-fast finds multiple definitions of afl related symbols.
I am trying to understand what's happening, but anyway the issue is for aflplusplus, all the failing checks are for fuzzers that call aflplusplus with different parameters.
@jonathanmetzman encountered a similar problem (although in that case it was missing symbols, not duplicates) in #110.

I tested manually changing the compiler to normal clang instead of afl-clang-fast and pcre does compile, so that might be the problem? But I am not sure if compiling pcre with only clang could lead to issues.
I did notice that the compiler for the afl fuzzer is clang though, not afl-clang-fast, is that normal?

Summarizing:
-PCRE compilation is the current problem, and only in aflplusplus and related fuzzers
-PCRE is compiled with afl-clang-fast and doesn't build, but compiling it with clang works
-Even after completing the build, the test case crashes making the test-run fail, and I don't know why yet, might be related to compiling PCRE with clang.

[inferno-chromium]

Not fixable.