[tracker] meson: Fix SQLite FTS5 check

[Carlos Garnacho <carlosg src gnome org>]

commit 1f9740138dfd85dc03e2595c3b16de999a4674cd
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Aug 25 18:23:39 2017 +0200

    meson: Fix SQLite FTS5 check
    
    Can't compile without main()

 meson.build |   19 +++++++++++--------
 1 files changed, 11 insertions(+), 8 deletions(-)
---
diff --git a/meson.build b/meson.build
index 7fdd5b3..4945c9a 100644
--- a/meson.build
+++ b/meson.build
@@ -103,14 +103,17 @@ endif
 if enable_fts
   sqlite3_builtin_fts5_test = '''
     #include <sqlite3.h>
-    sqlite3 *db;
-    int rc;
-    rc = sqlite3_open(":memory:", &db);
-    if (rc!=SQLITE_OK) return -1;
-    rc = sqlite3_exec(db, "create table a(text)", 0, 0, 0);
-    if (rc!=SQLITE_OK) return -1;
-    rc = sqlite3_exec(db, "create virtual table t using fts5(content='a',text)", 0, 0, 0);
-    if (rc!=SQLITE_OK) return -1;
+
+    int main (int argc, char *argv[]) {
+      sqlite3 *db;
+      int rc;
+      rc = sqlite3_open(":memory:", &db);
+      if (rc!=SQLITE_OK) return -1;
+      rc = sqlite3_exec(db, "create table a(text)", 0, 0, 0);
+      if (rc!=SQLITE_OK) return -1;
+      rc = sqlite3_exec(db, "create virtual table t using fts5(content='a',text)", 0, 0, 0);
+      if (rc!=SQLITE_OK) return -1;
+    }
   '''
 
   sqlite3_has_builtin_fts5 = cc.compiles(sqlite3_builtin_fts5_test,