CorebootPayloadPkg: Use unique path for IA32 and X64 payload binaries

Use unique output directory names so that both IA32 and X64 payloads
can be built without overwriting one another.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Scott Duplichan <scott@notabs.org>
---

Index: CorebootPayloadPkg/CorebootPayloadPkgIA32.dsc
===================================================================
--- CorebootPayloadPkg/CorebootPayloadPkgIA32.dsc	(revision 17108)
+++ CorebootPayloadPkg/CorebootPayloadPkgIA32.dsc	(working copy)
@@ -27,7 +27,7 @@
   SUPPORTED_ARCHITECTURES             = IA32|X64
   BUILD_TARGETS                       = DEBUG|RELEASE
   SKUID_IDENTIFIER                    = DEFAULT
-  OUTPUT_DIRECTORY                    = Build/CorebootPayloadPkg
+  OUTPUT_DIRECTORY                    = Build/CorebootPayloadPkgIA32
   FLASH_DEFINITION                    = CorebootPayloadPkg/CorebootPayloadPkg.fdf
   
   DEFINE SECURE_BOOT_ENABLE      = FALSE
Index: CorebootPayloadPkg/CorebootPayloadPkgX64.dsc
===================================================================
--- CorebootPayloadPkg/CorebootPayloadPkgX64.dsc	(revision 17108)
+++ CorebootPayloadPkg/CorebootPayloadPkgX64.dsc	(working copy)
@@ -27,7 +27,7 @@
   SUPPORTED_ARCHITECTURES             = IA32|X64
   BUILD_TARGETS                       = DEBUG|RELEASE
   SKUID_IDENTIFIER                    = DEFAULT
-  OUTPUT_DIRECTORY                    = Build/CorebootPayloadPkg
+  OUTPUT_DIRECTORY                    = Build/CorebootPayloadPkgX64
   FLASH_DEFINITION                    = CorebootPayloadPkg/CorebootPayloadPkg.fdf
   
   DEFINE SECURE_BOOT_ENABLE      = FALSE