modify file structure and create hdllib.cfg

applications/rfidb/librairies/detector/hdllib.cfg

+hdl_lib_name = detector
+hdl_library_clause_name = detector_lib
+hdl_lib_uses_synth = common technology ip_arria10_fifo ip_stratixiv_fifo tech_fifo dp ip_stratixiv_ram ip_arria10_ram tech_memory
+
+hdl_lib_technology = 
+
+synth_files = 
+    src/vhdl/universal_shift_reg.vhd
+    src/vhdl/uorl_power.vhd
+    src/vhdl/robust_mean.vhd
+    src/vhdl/power_detect.vhd
+    src/vhdl/expander.vhd
+    src/vhdl/detector.vhd
+    src/vhdl/write_rfi_db.vhd
+
+test_bench_files = 
+    tb/vhdl/tb_universal_shift_reg.vhd
+    tb/vhdl/tb_robust_mean.vhd
+    tb/vhdl/tb_power_detect.vhd
+    tb/vhdl/tb_expander.vhd
+    tb/vhdl/tb_detector.vhd
+    tb/vhdl/tb_write_rfi_db.vhd