Update references to test helpers

Replace:
* tests/src -> framework/tests/src
* tests/include -> framework/tests/include

Except for occurrences of:
* tests/src/test_helpers (since this only contains ssl_helpers.c)
* tests/src/test_certs.h
* tests/include/alt_dummy

Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/scripts/generate_visualc_files.pl b/scripts/generate_visualc_files.pl
index a0dfc57..4727322 100755
--- a/scripts/generate_visualc_files.pl
+++ b/scripts/generate_visualc_files.pl
@@ -25,10 +25,10 @@
 my $mbedtls_header_dir = 'include/mbedtls';
 my $psa_header_dir = 'include/psa';
 my $source_dir = 'library';
-my $test_source_dir = 'tests/src';
-my $test_header_dir = 'tests/include/test';
-my $test_drivers_header_dir = 'tests/include/test/drivers';
-my $test_drivers_source_dir = 'tests/src/drivers';
+my $test_source_dir = 'framework/tests/src';
+my $test_header_dir = 'framework/tests/include/test';
+my $test_drivers_header_dir = 'framework/tests/include/test/drivers';
+my $test_drivers_source_dir = 'framework/tests/src/drivers';
 
 my @thirdparty_header_dirs = qw(
     3rdparty/everest/include/everest
@@ -48,7 +48,7 @@
     3rdparty/everest/include/everest
     3rdparty/everest/include/everest/vs2013
     3rdparty/everest/include/everest/kremlib
-    tests/include
+    framework/tests/include
 );
 my $include_directories = join(';', map {"../../$_"} @include_directories);