CorebootPayloadPkg: Add NOOPT build to accommodate source level debugging

Add NOOPT build to accommodate source level debugging. The NOOPT build
avoids the use of compiler optimization so that every local variable is
accessible by a source level debugger.

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)
@@ -25,7 +25,7 @@
   PLATFORM_VERSION                    = 0.1
   DSC_SPECIFICATION                   = 0x00010005  
   SUPPORTED_ARCHITECTURES             = IA32|X64
-  BUILD_TARGETS                       = DEBUG|RELEASE
+  BUILD_TARGETS                       = DEBUG|RELEASE|NOOPT
   SKUID_IDENTIFIER                    = DEFAULT
   OUTPUT_DIRECTORY                    = Build/CorebootPayloadPkg
   FLASH_DEFINITION                    = CorebootPayloadPkg/CorebootPayloadPkg.fdf
Index: CorebootPayloadPkg/CorebootPayloadPkgX64.dsc
===================================================================
--- CorebootPayloadPkg/CorebootPayloadPkgX64.dsc	(revision 17108)
+++ CorebootPayloadPkg/CorebootPayloadPkgX64.dsc	(working copy)
@@ -25,7 +25,7 @@
   PLATFORM_VERSION                    = 0.1
   DSC_SPECIFICATION                   = 0x00010005  
   SUPPORTED_ARCHITECTURES             = IA32|X64
-  BUILD_TARGETS                       = DEBUG|RELEASE
+  BUILD_TARGETS                       = DEBUG|RELEASE|NOOPT
   SKUID_IDENTIFIER                    = DEFAULT
   OUTPUT_DIRECTORY                    = Build/CorebootPayloadPkg
   FLASH_DEFINITION                    = CorebootPayloadPkg/CorebootPayloadPkg.fdf