Makefile: Switch Clang Makefiles to always include the top-level Clang Makefile.
 - This eliminates most dependencies on how Clang is installed relative to LLVM.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@105637 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/Makefile b/docs/Makefile
index e9bbb28..053b263 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -7,7 +7,7 @@
 # 
 ##===----------------------------------------------------------------------===##
 
-LEVEL      := ../../..
+CLANG_LEVEL := ..
 DIRS       := tools
 
 ifdef BUILD_FOR_WEBSITE
@@ -22,7 +22,7 @@
 	  -e 's/@abs_top_builddir@/../g' > $@
 endif
 
-include $(LEVEL)/Makefile.common
+include $(CLANG_LEVEL)/Makefile
 
 HTML       := $(wildcard $(PROJ_SRC_DIR)/*.html) \
               $(wildcard $(PROJ_SRC_DIR)/*.css)