Moving transform_tables.c to isac_fix_common.

The target modules/audio_coding:isac_neon needs to link with
transform_tables.c but adding a dependency between isac_neon and
isac_fix_c creates a circular dependency.

This CL moves transform_tables.c to isac_fix_common (which is already a
dependency of isac_neon).

Bug: None
Change-Id: I4135ec772b0017e77f1411e9a8093b495220c636
Reviewed-on: https://webrtc-review.googlesource.com/71581
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22968}
diff --git a/modules/audio_coding/BUILD.gn b/modules/audio_coding/BUILD.gn
index 9c87887..31c1f6f 100644
--- a/modules/audio_coding/BUILD.gn
+++ b/modules/audio_coding/BUILD.gn
@@ -633,6 +633,7 @@
     "codecs/isac/fix/source/filterbank_internal.h",
     "codecs/isac/fix/source/settings.h",
     "codecs/isac/fix/source/structs.h",
+    "codecs/isac/fix/source/transform_tables.c",
   ]
   public_configs = [ ":isac_fix_config" ]
   deps = [
@@ -698,7 +699,6 @@
     "codecs/isac/fix/source/spectrum_ar_model_tables.c",
     "codecs/isac/fix/source/spectrum_ar_model_tables.h",
     "codecs/isac/fix/source/transform.c",
-    "codecs/isac/fix/source/transform_tables.c",
   ]
 
   public_configs = [ ":isac_fix_config" ]