Correct cleanup of age--x.x.x.sql files (#1505)

Corrected the cleanup that I added to the Makefile for the
age--x.x.x.sql files.

    modified:   Makefile

This change is NOT needed for the other branches as it was added
as part of the release cleanup.

Makefile

@@ -75,7 +75,9 @@ OBJS = src/backend/age.o \
 
 EXTENSION = age
 
-CLEANUP := $(shell rm age--?\.?\.?\.sql)
+# to allow cleaning of previous (old) age--.sql files
+all_age_sql = $(shell find . -maxdepth 1 -type f -regex './age--[0-9]+\.[0-9]+\.[0-9]+\.sql')
+
 SQLS := $(shell cat sql/sql_files)
 SQLS := $(addprefix sql/,$(SQLS))
 SQLS := $(addsuffix .sql,$(SQLS))
@@ -115,7 +117,7 @@ ag_regress_dir = $(srcdir)/regress
 REGRESS_OPTS = --load-extension=age --inputdir=$(ag_regress_dir) --outputdir=$(ag_regress_dir) --temp-instance=$(ag_regress_dir)/instance --port=61958 --encoding=UTF-8 --temp-config $(ag_regress_dir)/age_regression.conf
 
 ag_regress_out = instance/ log/ results/ regression.*
-EXTRA_CLEAN = $(addprefix $(ag_regress_dir)/, $(ag_regress_out)) src/backend/parser/cypher_gram.c src/include/parser/cypher_gram_def.h src/include/parser/cypher_kwlist_d.h $(age_sql)
+EXTRA_CLEAN = $(addprefix $(ag_regress_dir)/, $(ag_regress_out)) src/backend/parser/cypher_gram.c src/include/parser/cypher_gram_def.h src/include/parser/cypher_kwlist_d.h $(all_age_sql)
 
 GEN_KEYWORDLIST = $(PERL) -I ./tools/ ./tools/gen_keywordlist.pl
 GEN_KEYWORDLIST_DEPS = ./tools/gen_keywordlist.pl tools/PerfectHash.pm