Add very simple tcl tests for the lsm1 extension.

FossilOrigin-Name: 5e0a97930b08fff1c3a29f5c8b2962b856e3302209228c0e71b9f1a1bd2a4be3

ext/lsm1/test/lsm1_common.tcl

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+# 2014 Dec 19
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+
+if {![info exists testdir]} {
+  set testdir [file join [file dirname [info script]] .. .. .. test]
+}
+source $testdir/tester.tcl
+
+# Check if the lsm1 extension has been compiled.
+set lsm1 lsm1.so
+if {[file exists [file join .. $lsm1]]} {
+  proc return_if_no_lsm1 {} {}
+} else {
+  proc return_if_no_lsm1 {} {
+    finish_test
+    return -code return
+  }
+  return
+}
+
+proc load_lsm1_vtab {db} {
+  db enable_load_extension 1
+  db eval {SELECT load_extension('../lsm1')}
+}
+
+