!44 Fix 'make install' failed if havn't execute 'make' before it.

Merge pull request !44 from TotaJ/bugfix/makefailed

GNUmakefile.in

@@ -42,7 +42,9 @@ install_oracle_fdw:
 endif
 
 ifeq ($(enable_multiple_nodes), yes)
-install: install_mysql_fdw install_oracle_fdw
+install:
+	$(MAKE) install_mysql_fdw
+	$(MAKE) install_oracle_fdw
 	$(MAKE) -C contrib/hstore $@
 	$(MAKE) -C src/distribute/kernel/extension/packages $@
 	$(MAKE) -C contrib/pagehack $@
@@ -53,7 +55,9 @@ install: install_mysql_fdw install_oracle_fdw
 	$(MAKE) -C src/distribute/kernel/extension/tsdb $@
 	+@echo "PostgreSQL installation complete."
 else
-install: install_mysql_fdw install_oracle_fdw
+install:
+	$(MAKE) install_mysql_fdw
+	$(MAKE) install_oracle_fdw
 	$(MAKE) -C contrib/pg_stat_statements $@
 	+@echo "openGauss installation complete."
 endif