Stop installing two unneeded files, including perf suite

Perf suite contains many files with dubious licensing and is
typically not useful in normal use. Since ed38447 it's no longer
needed to run tests.

Makefile

@@ -259,10 +259,11 @@ endif
  $(INSTALL_M) $(build_private_libdir)/sys.$(SHLIB_EXT) $(DESTDIR)$(private_libdir)
  # Copy in all .jl sources as well
  cp -R -L $(build_datarootdir)/julia $(DESTDIR)$(datarootdir)/
- # Remove git repository of juliadoc
- -rm -rf $(DESTDIR)$(datarootdir)/julia/doc/juliadoc/.git
- -rm -f $(DESTDIR)$(datarootdir)/julia/doc/juliadoc/.gitignore
- # Copy in beautiful new man page!
+ # Remove perf suite
+ -rm -rf $(DESTDIR)$(datarootdir)/julia/test/perf/
+ # Remove various files which should not be installed
+ -rm -f $(DESTDIR)$(datarootdir)/julia/base/version_git.sh
+ -rm -f $(DESTDIR)$(datarootdir)/julia/test/Makefile
  $(INSTALL_F) $(build_datarootdir)/man/man1/julia.1 $(DESTDIR)$(datarootdir)/man/man1/
  # Copy icon and .desktop file
  mkdir -p $(DESTDIR)$(datarootdir)/icons/hicolor/scalable/apps/