fmt update

Fix: Placed all +build tags in the same location
Fix: Split CFLAGS, LDFLAGS into seperate lines for readability and lookup
Fix: Placed empty line between copyright comments and build tags for readability
Fix: Placed OS specfic cgo flags at the end if the cgo sections contains multiple lines.

sqlite3_opt_json1.go

@@ -2,6 +2,7 @@
 //
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file.
+
 // +build sqlite_json sqlite_json1 json1
 
 package sqlite3