[CMake] NFC. Updating CMake dependency specifications

This patch updates a bunch of places where add_dependencies was being explicitly called to add dependencies on intrinsics_gen to instead use the DEPENDS named parameter. This cleanup is needed for a patch I'm working on to add a dependency debugging mode to the build system.

llvm-svn: 287206
diff --git a/llvm/lib/CodeGen/AsmPrinter/CMakeLists.txt b/llvm/lib/CodeGen/AsmPrinter/CMakeLists.txt
index 68a9973..05c6a28 100644
--- a/llvm/lib/CodeGen/AsmPrinter/CMakeLists.txt
+++ b/llvm/lib/CodeGen/AsmPrinter/CMakeLists.txt
@@ -22,6 +22,7 @@
   OcamlGCPrinter.cpp
   WinException.cpp
   CodeViewDebug.cpp
-  )
 
-add_dependencies(LLVMAsmPrinter intrinsics_gen)
+  DEPENDS
+  intrinsics_gen
+  )