Update prefix of build tags to `sqlite_`

* Keep current build tags backwards compliant
* Added alias for `sqlite_json1` => `sqlite_json`

sqlite3_opt_fts5.go

@@ -2,7 +2,7 @@
 //
 // Use of this source code is governed by an MIT-style
 // license that can be found in the LICENSE file.
-// +build fts5
+// +build sqlite_fts5 fts5
 
 package sqlite3
 

sqlite3_opt_icu.go

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

sqlite3_opt_json1.go

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

sqlite3_opt_vtable.go

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

sqlite3_opt_vtable_test.go

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