update(AMBuilder): Supress warnings

Author: skuzzis

AMBuilder

@@ -41,6 +41,7 @@ for sdk_target in MMSPlugin.sdk_targets:
 			"-Wno-invalid-offsetof",
 			"-Wno-return-local-addr",
 			"-Wno-overloaded-virtual",
+			"-Wno-unknown-pragmas",
 			"-Wno-non-virtual-dtor",
 			"-Wno-attributes",
 			"-Wno-array-bounds",
@@ -52,6 +53,7 @@ for sdk_target in MMSPlugin.sdk_targets:
 			"-Wno-invalid-offsetof",
 			"-Wno-return-local-addr",
 			"-Wno-overloaded-virtual",
+			"-Wno-unknown-pragmas",
 			"-Wno-non-virtual-dtor",
 			"-Wno-attributes",
 			"-Wno-array-bounds",