Update bootstrap with PAST additions broken out.

Author: jnthn

build/Makefile.in

@@ -234,6 +234,7 @@ $(STAGE0): $(STAGE0_PBCS)
 
 $(STAGE0_PBCS): $(DYNEXT_TARGET) $(STAGE0_SOURCES)
 	$(PARROT) -o $(STAGE0)/$(REGEX_PBC)        src/stage0/Regex-s0.pir
+    $(PARROT) -o $(PAST_PBC)                   src/stage0/PASTRegex-s0.pir
 	$(PARROT) -o $(STAGE0)/$(HLL_PBC)          src/stage0/HLL-s0.pir
 	$(PARROT) -o $(STAGE0)/$(P6REGEX_PBC)      src/stage0/P6Regex-s0.pir
 	$(PARROT) -o $(STAGE0)/$(NQP_MO_PBC)       src/stage0/NQPMO-s0.pir