[sanitizers] build symbolizer with lld (llvm#172093)

Without this, we use the system /usr/bin/ld, which is an older LLD.

That can lead to problems with LTO and breaks the aarch64 buildbot.

Author: fmayer

compiler-rt/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh

@@ -83,7 +83,7 @@ if [[ ! -d ${ZLIB_BUILD} ]]; then
 fi
 
 cd ${ZLIB_BUILD}
-AR="${AR}" CC="${CC}" CFLAGS="$FLAGS -Wno-deprecated-non-prototype" RANLIB=/bin/true ./configure --static
+AR="${AR}" CC="${CC}" CFLAGS="$FLAGS -Wno-deprecated-non-prototype -fuse-ld=lld" RANLIB=/bin/true ./configure --static
 # TODO: remove this. this is for debugging buildbot problems
 cat configure.log
 make -j libz.a