Ghidra 12.1.2 (#424)

Bump Ghidra HEAD commit 6e8d599d5

Changed files:

```
M	Ghidra/Processors/RISCV/data/languages/riscv.csr.sinc
M	Ghidra/Processors/RISCV/data/languages/riscv.table.sinc
```

Commit details:

```
[Commit 1/1]
Hash: 6a40c607cd38f77ee95bb2c8276eb750749279fd
Date: 2026-05-27 09:35:06 -0400
Message: GP-6849: Fixed RISC-V writing to constant and a few register operands

Files changed:
  M	Ghidra/Processors/RISCV/data/languages/riscv.csr.sinc
  M	Ghidra/Processors/RISCV/data/languages/riscv.table.sinc
```

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/setup-ghidra-source.cmake

@@ -22,7 +22,7 @@ set_property(CACHE sleigh_RELEASE_TYPE PROPERTY STRINGS "stable" "HEAD")
 find_package(Git REQUIRED)
 
 # Ghidra pinned stable version commit
-set(ghidra_version "12.1")
+set(ghidra_version "12.1.2")
 set(ghidra_git_tag "Ghidra_${ghidra_version}_build")
 set(ghidra_shallow TRUE)
 
@@ -55,7 +55,7 @@ if("${sleigh_RELEASE_TYPE}" STREQUAL "HEAD")
   # TODO: CMake only likes numeric characters in the version string....
   set(ghidra_head_version "12.2")
   set(ghidra_version "${ghidra_head_version}")
-  set(ghidra_head_git_tag "3d92a003fcd9a9949d78a172dc7295b95af12965")
+  set(ghidra_head_git_tag "6e8d599d520e5bf42d556d8d2a4871744063a641")
   set(ghidra_git_tag "${ghidra_head_git_tag}")
   set(ghidra_shallow FALSE)
   set(ghidra_patches

tests/CMakeLists.txt

@@ -26,10 +26,11 @@ add_executable(sleigh_decomp_test
   "${library_root}/../unittests/testparamstore.cc"
 )
 
-# if(sleigh_RELEASE_IS_HEAD)
-#   target_sources(sleigh_decomp_test PRIVATE
-#   )
-# endif()
+if(sleigh_RELEASE_IS_HEAD)
+  target_sources(sleigh_decomp_test PRIVATE
+    "${library_root}/../unittests/testmultiprec.cc"
+  )
+endif()
 
 target_compile_features(sleigh_decomp_test PRIVATE cxx_std_11)
 target_include_directories(sleigh_decomp_test PRIVATE "${library_root}")