Disable shell test cases that require virtual tables when testfixture is

built using SQLITE_OMIT_VIRTUALTABLE.

FossilOrigin-Name: 8c73d54fd1e250fcd7f30741cfbd169af9aaecc2096c0c8a9486abaa064d69af

test/shell2.test

@@ -217,6 +217,7 @@ do_test shell2-1.4.9 {
 done
 2}}
 
+ifcapable vtab {
 # Verify that generate_series stays sane near 64-bit range boundaries.
 # See overflow report at https://sqlite.org/forum/forumpost/5d34ce5280
 do_test shell2-1.4.10 {
@@ -247,7 +248,9 @@ do_test shell2-1.4.10 {
 0
 1
 2}}
+}  ;# ifcapable vtab
 
+ifcapable vtab {
 # Bug discovered while messing around, .import hangs with
 # bit 7 set in column separator.
 do_test shell2-1.4.11 {
@@ -262,6 +265,7 @@ do_test shell2-1.4.11 {
 .import dummy.csv t
  SELECT count(*) FROM t;}]]
 } {0 1}
+} ;# ifcapable vtab
 
 # Bug from forum post 7cbe081746dd3803
 # Keywords as column names were producing an error message.

test/shell5.test

@@ -84,6 +84,14 @@ do_test shell5-1.4.1 {
 .import FOO t1}]
 } {1 {Error: cannot open "FOO"}}
 
+# the remainder of these test cases require virtual tables.
+#
+ifcapable !vtab {
+  puts "Skipping subsequent tests due to SQLITE_OMIT_VIRTUALTABLE"
+  finish_test
+  return
+}
+
 # empty import file
 do_test shell5-1.4.2 {
   forcedelete shell5.csv