PSP: Add EBOOT.PBP to a dist files list for the Buildbot packager

Makefile

@@ -117,4 +117,4 @@ print-dists:
 	@echo $(foreach V, $(filter DIST_FILES_%, $(.VARIABLES)), $($V))
 
 print-executables:
-	@echo $(EXECUTABLE) $(PLUGINS)
+	@echo $(if $(DIST_EXECUTABLES),$(DIST_EXECUTABLES),$(EXECUTABLE) $(PLUGINS))

backends/platform/psp/psp.mk

@@ -3,6 +3,7 @@ PSP_EBOOT = EBOOT.PBP
 PSP_EBOOT_SFO = param.sfo
 PSP_EBOOT_TITLE = ScummVM-PSP
 DATE = $(shell date +%Y%m%d)
+DIST_EXECUTABLES=$(PSP_EBOOT) $(PLUGINS)
 
 MKSFO = mksfoex -d MEMSIZE=1
 PACK_PBP = pack-pbp