Update Ghidra HEAD to commit 7a5a9ea5d (#374)

Bump Ghidra HEAD commit 7a5a9ea5d

Changed files:

```
M	Ghidra/Processors/ARM/data/languages/ARMinstructions.sinc
M	Ghidra/Processors/PowerPC/data/languages/ppc_common.sinc
M	Ghidra/Processors/PowerPC/data/languages/ppc_instructions.sinc
```

Commit details:

```
[Commit 1/2]
Hash: 22a5a22d824f68bff4db7d8c123661789f28ca61
Date: 2025-08-10 19:33:56 +0300
Message: PowerPC: fix condition check in bd*f* opcodes

Files changed:
  M	Ghidra/Processors/PowerPC/data/languages/ppc_common.sinc
  M	Ghidra/Processors/PowerPC/data/languages/ppc_instructions.sinc

[Commit 2/2]
Hash: 5857e63741c54a2db54450f5bc32e56fe94b62a5
Date: 2025-11-13 20:31:53 +0000
Message: GP-6118 Fix for specialized ARM cpy pc,lr

Files changed:
  M	Ghidra/Processors/ARM/data/languages/ARMinstructions.sinc
```

Author: auto-updater[bot]

src/setup-ghidra-source.cmake

@@ -52,7 +52,7 @@ if("${sleigh_RELEASE_TYPE}" STREQUAL "HEAD")
   # TODO: CMake only likes numeric characters in the version string....
   set(ghidra_head_version "12.1")
   set(ghidra_version "${ghidra_head_version}")
-  set(ghidra_head_git_tag "be482754a73ba9713d099565227b7f19d1f3e89c")
+  set(ghidra_head_git_tag "7a5a9ea5d4041a4e858b4ad056ffc4bf29182df0")
   set(ghidra_git_tag "${ghidra_head_git_tag}")
   set(ghidra_shallow FALSE)
   set(ghidra_patches