Revert 64023. make prefers GNUmakefile over makefile.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64024 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/GNUmakefile b/utils/buildit/GNUmakefile
similarity index 100%
rename from GNUmakefile
rename to utils/buildit/GNUmakefile
diff --git a/build_llvm b/utils/buildit/build_llvm
similarity index 100%
rename from build_llvm
rename to utils/buildit/build_llvm