Use glob for go_library srcs in BUILD.bazel (#278)

The srcs list was hand-maintained and fell out of sync when v43 split
code into feature-gated files (config_feat_*.go, linker_feat_wasi.go,
module_feat_cranelift.go, store_feat_wasi.go, etc.). This caused Bazel
builds to fail with undefined symbol errors since the new files were
never added to srcs.

Switch to glob() to match the pattern already used for go_test srcs,
so new source files are automatically picked up.

Author: AidanTanium

BUILD.bazel

@@ -16,38 +16,14 @@ cc_library(
 
 go_library(
     name = "go_default_library",
-    srcs = [
-        "config.go",
-        "doc.go",
-        "engine.go",
-        "error.go",
-        "exporttype.go",
-        "extern.go",
-        "externtype.go",
-        "ffi.go",
-        "func.go",
-        "functype.go",
-        "global.go",
-        "globaltype.go",
-        "importtype.go",
-        "instance.go",
-        "linker.go",
-        "maybe_gc_no.go",
-        "memory.go",
-        "memorytype.go",
-        "module.go",
-        "shims.c",
-        "shims.h",
-        "slab.go",
-        "store.go",
-        "table.go",
-        "tabletype.go",
-        "trap.go",
-        "val.go",
-        "valtype.go",
-        "wasi.go",
-        "wat2wasm.go",
-    ],
+    srcs = glob(
+        [
+            "*.go",
+            "*.c",
+            "*.h",
+        ],
+        exclude = ["*_test.go"],
+    ),
     cdeps = [":wasmtime"],  # add wasmtime dep
     cgo = True,
     clinkopts = select({