Add file version information to most installed Windows binaries.

Prominent binaries already had this metadata.  A handful of minor
binaries, such as pg_regress.exe, still lack it; efforts to eliminate
such exceptions are welcome.

Michael Paquier, reviewed by MauMau.

contrib/btree_gist/Makefile

@@ -6,10 +6,11 @@ OBJS =  btree_gist.o btree_utils_num.o btree_utils_var.o btree_int2.o \
         btree_int4.o btree_int8.o btree_float4.o btree_float8.o btree_cash.o \
         btree_oid.o btree_ts.o btree_time.o btree_date.o btree_interval.o \
         btree_macaddr.o btree_inet.o btree_text.o btree_bytea.o btree_bit.o \
-        btree_numeric.o
+        btree_numeric.o $(WIN32RES)
 
 EXTENSION = btree_gist
 DATA = btree_gist--1.0.sql btree_gist--unpackaged--1.0.sql
+PGFILEDESC = "btree_gist - B-tree equivalent GIST operator classes"
 
 REGRESS = init int2 int4 int8 float4 float8 cash oid timestamp timestamptz \
         time timetz date interval macaddr inet cidr text varchar char bytea \