[geary] Add note to INSTALL about required SQLite 3.11 compilation flags.

[Michael Gratton <mjog src gnome org>]

commit 2ba37391df7454575d27b0c0ec313299bc6ee3d2
Author: Michael James Gratton <mike vee net>
Date:   Sun May 15 19:34:50 2016 +1000

    Add note to INSTALL about required SQLite 3.11 compilation flags.

 INSTALL |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/INSTALL b/INSTALL
index 3a521b5..7adfdac 100644
--- a/INSTALL
+++ b/INSTALL
@@ -46,6 +46,12 @@
     WebKitGTK-3 versions 2.1.1 to 2.1.90.0.  See
     <https://bugzilla.gnome.org/show_bug.cgi?id=713168> for details.
 
+    Geary requires SQLite to be built with the compiler flag
+    `-DSQLITE_ENABLE_FTS3`. Further, SQLite version 3.11.x specifically
+    must also be built with `-DSQLITE_ENABLE_FTS3_TOKENIZER`. Most
+    distribution's packages meet these requirements, however Fedora
+    24 users and others may be required to rebuild SQLite 3.11 with
+    the second flag.
 
   * Installing dependencies on Fedora