build: Define .INTERMEDIATE target once only

Makefile.am

@@ -12,6 +12,7 @@ if ENABLE_MAN
 SUBDIRS += doc/man
 endif
 .PHONY: deploy FORCE
+.INTERMEDIATE: $(OSX_TEMP_ISO) $(COVERAGE_INFO)
 
 export PYTHONPATH
 
@@ -136,7 +137,6 @@ $(APP_DIST_DIR)/Applications:
 
 $(APP_DIST_EXTRAS): $(APP_DIST_DIR)/$(OSX_APP)/Contents/MacOS/Bitcoin-Qt
 
-.INTERMEDIATE: $(OSX_TEMP_ISO)
 $(OSX_TEMP_ISO): $(APP_DIST_EXTRAS)
 	$(XORRISOFS) -D -l -V "$(OSX_VOLNAME)" -no-pad -r -dir-mode 0755 -o $@ dist
 
@@ -332,8 +332,6 @@ EXTRA_DIST += \
 
 CLEANFILES = $(OSX_DMG) $(BITCOIN_WIN_INSTALLER)
 
-.INTERMEDIATE: $(COVERAGE_INFO)
-
 DISTCHECK_CONFIGURE_FLAGS = --enable-man
 
 doc/doxygen/.stamp: doc/Doxyfile FORCE