make cleandir fails

[Matt Smith]

make cleandir fails, line 733

"/usr/src/Makefile.inc1", line 773: warning: String comparison operator 
should be either == or !=
"/usr/src/Makefile.inc1", line 773: Malformed conditional 
((!defined(NO_RESCUE) ||  defined(RELEASEDIR)) &&  (${TARGET_ARCH} !
= ${MACHINE_ARCH} || ${BOOTSTRAPPING} < 501101))
"/usr/src/Makefile.inc1", line 773: Missing dependency operator
"/usr/src/Makefile.inc1", line 775: if-less endif
"/usr/src/Makefile.inc1", line 775: Need an operator
make: fatal errors encountered -- cannot continue
*** Error code 1

${BOOTSTRAPPING} appears to be a string.