Bump Ghidra HEAD commit 98b938cc6

Changed files:

```
M	Ghidra/Features/Decompiler/src/decompile/cpp/block.cc
M	Ghidra/Features/Decompiler/src/decompile/cpp/block.hh
M	Ghidra/Features/Decompiler/src/decompile/cpp/blockaction.cc
M	Ghidra/Features/Decompiler/src/decompile/cpp/typeop.cc
M	Ghidra/Processors/x86/data/languages/x86-64.dwarf
M	Ghidra/Processors/x86/data/languages/x86.dwarf
```

Commit details:

```
[Commit 1/2]
Hash: e908ab6fbf4311f99fa86d50b60aa4802a6e3fd6
Date: 2025-08-11 11:21:28 -0400
Message: DWARF expression handling refactor
Details:
Cleanup logic of expression evaluation, stub out resolution of register
values to a callback in case we want to use constant propagation to try
to allow successful calculations, and add support for default static
values for treating an arch's stack frame register (e.g. RBP) like the
static CFA value we already have support for.

Add option to decorate params and local vars with their DWARF storage
location info.

Handle arrays with unspecified element type.

Files changed:
  M	Ghidra/Processors/x86/data/languages/x86-64.dwarf
  M	Ghidra/Processors/x86/data/languages/x86.dwarf

[Commit 2/2]
Hash: 29b7cb655283c124b4d999e8b3d45c58e7004b69
Date: 2025-08-07 15:19:32 +0000
Message: GP-5915 Fix bug in ConditionalJoin

Files changed:
  M	Ghidra/Features/Decompiler/src/decompile/cpp/block.cc
  M	Ghidra/Features/Decompiler/src/decompile/cpp/block.hh
  M	Ghidra/Features/Decompiler/src/decompile/cpp/blockaction.cc
  M	Ghidra/Features/Decompiler/src/decompile/cpp/typeop.cc
```

Author: pgoodman

src/setup-ghidra-source.cmake

@@ -52,7 +52,7 @@ if("${sleigh_RELEASE_TYPE}" STREQUAL "HEAD")
   # TODO: CMake only likes numeric characters in the version string....
   set(ghidra_head_version "12.0")
   set(ghidra_version "${ghidra_head_version}")
-  set(ghidra_head_git_tag "42794bc3fa63b707eba3bf055228b12d3085f5eb")
+  set(ghidra_head_git_tag "98b938cc65d96734daa39a1494533cc65bc5fc41")
   set(ghidra_git_tag "${ghidra_head_git_tag}")
   set(ghidra_shallow FALSE)
   set(ghidra_patches