Fix llvm-x86_64-debian-dylib buildbot

This was broken by 91a3846.

(cherry picked from commit ff4d6c6)

Author: tstellar

llvm/test/lit.cfg.py

@@ -414,10 +414,11 @@ def version_int(ver):
     config.available_features.add("llvm-dylib")
     config.substitutions.append(
         (
+            # libLLVM.so.19.0git
             "%llvmdylib",
-            "{}/libLLVM-{}{}".format(
-                config.llvm_shlib_dir, config.llvm_dylib_version, config.llvm_shlib_ext
-            ),
+            "{}/libLLVM{}.{}".format(
+                config.llvm_shlib_dir, config.llvm_shlib_ext, config.llvm_dylib_version
+            )
         )
     )
 

llvm/test/lit.site.cfg.py.in

@@ -44,7 +44,7 @@ config.build_examples = @LLVM_BUILD_EXAMPLES@
 config.enable_threads = @LLVM_ENABLE_THREADS@
 config.build_shared_libs = @BUILD_SHARED_LIBS@
 config.link_llvm_dylib = @LLVM_LINK_LLVM_DYLIB@
-config.llvm_dylib_version = "@LLVM_VERSION_MAJOR@@LLVM_VERSION_SUFFIX@"
+config.llvm_dylib_version = "@LLVM_VERSION_MAJOR@.@LLVM_VERSION_MINOR@@LLVM_VERSION_SUFFIX@"
 config.llvm_host_triple = '@LLVM_HOST_TRIPLE@'
 config.host_arch = "@HOST_ARCH@"
 config.have_opt_viewer_modules = @LLVM_HAVE_OPT_VIEWER_MODULES@