[lldb][sanitized] Don't overwrite TARGETS_TO_BUILD

We moved the sanitized bot to arm64 but the LLVM we were building was
only X86-enabled. So when the freshly built Clang was used to compile
the runtimes it failed on arm64.

This was happening because we were overwriting the TARGETS_TO_BUILD for
the sanitized variant. There's no need to overwrite it. We should just
build for X86 *AND* AArch64, which would get us some more LLDB test coverage too.

Author: Michael137

zorg/jenkins/build.py

@@ -568,7 +568,6 @@ def lldb_cmake_builder(target, variant=None):
         cmake_cmd.append('-DLLDB_ENABLE_LUA=On')
 
     if variant == 'sanitized':
-        cmake_cmd.append('-DLLVM_TARGETS_TO_BUILD=X86')
         cmake_cmd.append('-DLLVM_USE_SANITIZER=Address;Undefined')
         # There is no need to compile the lldb tests with an asanified compiler
         # if we have a host compiler available.