Prevent a linker error. It complains about multiple definitions of nothrow.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10985 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/kernel/core/util/Jamfile

@@ -7,5 +7,5 @@ KernelMergeObject kernel_util.o :
 	kernel_cpp.cpp
 	KMessage.cpp
 
-	: -fno-pic -Wno-unused -D_KERNEL_MODE
+	: -fno-pic -Wno-unused -D_KERNEL_MODE -DUSING_LIBGCC
 	;

src/kernel/core/util/kernel_cpp.cpp

@@ -15,7 +15,10 @@
 // Always define the symbols needed when not linking against libgcc.a --
 // we simply override them.
 
+// ... it doesn't seem to work with this symbol at least.
+#ifndef USING_LIBGCC
 const nothrow_t std::nothrow = {};
+#endif
 
 #if __GNUC__ == 2