kbuild: Modversions fix

We're still using the old genksyms binary, that's why we have to 
postprocess the output to convert it into a linker script - that
postprocessing got confused by "__verify_write".

Kick out the grep, do it all and correctly within sed.

Bug reported by Thomas Molina.

scripts/Makefile.build

@@ -94,8 +94,7 @@ define rule_vcc_o_c
 	else								      \
 		$(CPP) -D__GENKSYMS__ $(c_flags) $<			      \
 		| $(GENKSYMS) -k $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)	      \
-		| grep __ver						      \
-		| sed 's/\#define __ver_\([^ 	]*\)[ 	]*\([^ 	]*\)/__crc_\1 = 0x\2 ;/g' \
+		| sed -n 's/\#define __ver_\(\w*\)\W*\(\w*\)/__crc_\1 = 0x\2 ;/gp' \
 		> $(@D)/.tmp_$(@F:.o=.ver);				      \
 									      \
 		$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) 		      \