Update build scripts

Author: pskrbasu

build.sh

@@ -1,4 +1,8 @@
 #!/usr/bin/env bash
+
+# This script is used to build FDW binaries for Darwin and Linux. Should be used to build
+# and update FDW locally.
+
 cd fdw
 make clean
 make go

build_binary.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+# This script is used to build FDW binaries for Darwin and Linux. Should be used in release
+# workflows. Running this locally would just create the binaries, not update them in your system.
+
+cd fdw
+make clean
+make go
+make
+make inst
+cd -
+
+#pg_ctl -D /usr/local/var/postgres restart
+#psql postgres