META MODE: Fix rebuilding of lib/clang/include after clang-tblgen.host is

staged.

None of usr.bin/clang/clang-tblgen or its dependencies need
lib/clang/include, so there is no cyclic dependency here to worry about.
The issue came about because of workarounds to dependencies on clang
being optional.

Without this, the clang-tblgen called during the build would change
after it was staged for the host.  This would cause lib/clang/include to
rebuild due to changed build commands.

Sponsored by:	EMC / Isilon Storage Division

lib/clang/include/Makefile

@@ -67,7 +67,4 @@ INCS=	__stddef_max_align_t.h \
 GENINCS= arm_neon.h
 CLEANFILES= ${GENINCS} ${GENINCS:C/\.h$/.d/}
 
-# avoid a circular dependency
-GENDIRDEPS_FILTER+= Nusr.bin/clang/clang-tblgen.host
-
 .include <bsd.prog.mk>

lib/clang/include/Makefile.depend

@@ -2,6 +2,7 @@
 # Autogenerated - do NOT edit!
 
 DIRDEPS = \
+	usr.bin/clang/clang-tblgen.host \
 
 
 .include <dirdeps.mk>