[ORC] Fix the prototype of a C API function. (#139259)

In 38d16f5, the `TargetTriple` argument
was removed from the `LLVMOrcCreateStaticLibrarySearchGeneratorForPath`
without updating the C API headers. This resulted in the function being
exported without C linkage, making it impossible to use from C.

Co-authored-by: Lang Hames <[email protected]>

Author: maleadt

llvm/include/llvm-c/Orc.h

@@ -1059,7 +1059,7 @@ LLVMErrorRef LLVMOrcCreateDynamicLibrarySearchGeneratorForPath(
  */
 LLVMErrorRef LLVMOrcCreateStaticLibrarySearchGeneratorForPath(
     LLVMOrcDefinitionGeneratorRef *Result, LLVMOrcObjectLayerRef ObjLayer,
-    const char *FileName, const char *TargetTriple);
+    const char *FileName);
 
 /**
  * Create a ThreadSafeContext containing a new LLVMContext.