unoil: add missing dependencies in custom makefile

solenv/gbuild/gbuild_simple.mk

@@ -82,6 +82,13 @@ include $(GBUILDDIR)/Tempfile.mk
 # Include platform/cpu/compiler specific config/definitions
 include $(GBUILDDIR)/platform/$(OS)_$(CPUNAME)_$(COM).mk
 
+ifeq ($(CROSS_COMPILING),YES)
+# We can safely Assume all cross-compilation is from Unix systems.
+gb_Executable_EXT_for_build :=
+else
+gb_Executable_EXT_for_build := $(gb_Executable_EXT)
+endif
+
 ifeq ($(SYSTEM_PYTHON),YES)
 gb_PYTHONTARGET :=
 gb_PYTHON := $(PYTHON)

unoil/javamaker/Makefile

@@ -28,7 +28,7 @@
 gb_PARTIALBUILD := T
 include $(GBUILDDIR)/gbuild_simple.mk
 
-done :
+done : $(OUTDIR)/bin/offapi.rdb $(OUTDIR)/bin/udkapi.rdb $(OUTDIR_FOR_BUILD)/bin/javamaker$(gb_Executable_EXT_for_build)
 	$(call gb_Helper_abbreviate_dirs_native, \
 	$(call gb_Helper_execute,javamaker -BUCR -O. $(OUTDIR)/bin/offapi.rdb -X$(OUTDIR)/bin/udkapi.rdb) && \
 	touch $@)