Fixed bugs / added warning prints to PP3 BRAM initialization pass, added test for PP3 BRAM inference and initialization

Signed-off-by: Maciej Kurc <mkurc@antmicro.com>
diff --git a/ql-qlf-plugin/tests/pp3_bram/init.txt b/ql-qlf-plugin/tests/pp3_bram/init.txt
new file mode 100644
index 0000000..9d8fb6f
--- /dev/null
+++ b/ql-qlf-plugin/tests/pp3_bram/init.txt
@@ -0,0 +1,6 @@
+@000
+1234
+5678
+ABCD
+EFFF
+