Replace gtkwave with libfst submodule (#5)

Author: gezalore

.gitmodules

@@ -25,9 +25,6 @@
 [submodule "submodules/example-systemverilog"]
 	path = submodules/example-systemverilog
 	url = https://github.com/verilator/example-systemverilog.git
-[submodule "submodules/gtkwave"]
-	path = submodules/gtkwave
-	url = https://github.com/gtkwave/gtkwave.git
 [submodule "submodules/sv-bugpoint"]
 	path = submodules/sv-bugpoint
 	url = https://github.com/antmicro/sv-bugpoint
@@ -37,3 +34,6 @@
 [submodule "submodules/wbuart32"]
 	path = submodules/wbuart32
 	url = https://github.com/ZipCPU/wbuart32.git
+[submodule "submodules/libfst"]
+	path = submodules/libfst
+	url = https://github.com/gtkwave/libfst.git

submodules/gtkwave

@@ -27,15 +27,14 @@ def check(a, b, basename):
     test.skip("Skipping due to no VERILATOR_TEST_UPSTREAM")
 
 print(os.getcwd)
-g = "submodules/gtkwave"
+g = "submodules/libfst"
 v = os.environ['VERILATOR_ROOT']
 
-check(g + "/src/helpers", v + "/include/gtkwave", "wavealloca.h")
-check(g + "/lib/libfst", v + "/include/gtkwave", "fastlz.h")
-check(g + "/lib/libfst", v + "/include/gtkwave", "fastlz.c")
-check(g + "/lib/libfst", v + "/include/gtkwave", "fstapi.h")
-check(g + "/lib/libfst", v + "/include/gtkwave", "fstapi.c")
-check(g + "/lib/libfst", v + "/include/gtkwave", "lz4.h")
-check(g + "/lib/libfst", v + "/include/gtkwave", "lz4.c")
+check(g + "/src", v + "/include/gtkwave", "fastlz.h")
+check(g + "/src", v + "/include/gtkwave", "fastlz.c")
+check(g + "/src", v + "/include/gtkwave", "fstapi.h")
+check(g + "/src", v + "/include/gtkwave", "fstapi.c")
+check(g + "/src", v + "/include/gtkwave", "lz4.h")
+check(g + "/src", v + "/include/gtkwave", "lz4.c")
 
 test.passes()