Revert r227403 for now. Since the cross-tools stage purposefully

doesn't have ${WORLDTMP}/usr/bin in its PATH, if you build world with
CC=clang, tblgen tools from /usr/bin will be used instead of the ones
built under ${WORLDTMP}.  This can lead to various errors, especially if
you upgrade from an older clang.

Note that building world with gcc would not experience these problems,
because it only uses the tblgen tools in the world stage, where PATH
does contain ${WORLDTMP}/usr/bin.

Pointy hat to:	dim

Makefile.inc1

@@ -1029,6 +1029,14 @@ _gensnmptree=	usr.sbin/bsnmpd/gensnmptree
 _crunchgen=	usr.sbin/crunch/crunchgen
 .endif
 
+.if ${MK_CLANG} != "no"
+_clang_tblgen= \
+	lib/clang/libllvmsupport \
+	lib/clang/libllvmtablegen \
+	usr.bin/clang/tblgen \
+	usr.bin/clang/clang-tblgen
+.endif
+
 .if ${MK_CDDL} != "no" && \
     ${BOOTSTRAPPING} < 800038 && \
     !(${BOOTSTRAPPING} >= 700112 && ${BOOTSTRAPPING} < 799999)
@@ -1045,6 +1053,7 @@ _dtc= gnu/usr.bin/dtc
 #	FreeBSD versions that need the tool built at this stage of the build.
 bootstrap-tools:
 .for _tool in \
+    ${_clang_tblgen} \
     ${_dtrace_tools} \
     ${_strfile} \
     ${_gperf} \
@@ -1140,13 +1149,9 @@ _binutils=	gnu/usr.bin/binutils
 .endif
 
 .if ${MK_CLANG} != "no"
-_clang_tblgen=	lib/clang/libllvmsupport \
-		lib/clang/libllvmtablegen \
-		usr.bin/clang/tblgen \
-		usr.bin/clang/clang-tblgen
 .if ${CC:T:Mclang} == "clang"
-_clang_libs=	lib/clang
 _clang=		usr.bin/clang
+_clang_libs=	lib/clang
 .endif
 .endif
 
@@ -1156,7 +1161,6 @@ _cc=		gnu/usr.bin/cc
 
 cross-tools:
 .for _tool in \
-    ${_clang_tblgen} \
     ${_clang_libs} \
     ${_clang} \
     ${_binutils} \