Make boost compile errors not break the build.

boost/Makefile

@@ -16,7 +16,7 @@ impl:
 	mkdir -p target && \
 	CXX=$$(which c++) ./bootstrap.sh --prefix=$$PWD/target/ --with-toolset=clang && \
 	./b2 clean && \
-	./b2 --prefix=$$PWD/target/ toolset=clang
+	./b2 --prefix=$$PWD/target/ toolset=clang || true
 	# ^ ||true because with clang I saw a few libraries not compile correctly, we can ignore those.
 	#./b2 --with-program_options --prefix=$$PWD/target/ toolset=clang cxxflags="-stdlib=libc++ -std=c++17" linkflags="-stdlib=libc++"