Just ignore unknown ELF program headers instead of failing.

* This fixes loading executables with a TLS section (which we do not support
  so far, though). Still, no reason to let the runtime loader choke on it.

src/system/runtime_loader/elf_load_image.cpp

@@ -1,6 +1,6 @@
 /*
  * Copyright 2008-2009, Ingo Weinhold, [email protected].
- * Copyright 2003-2008, Axel Dörfler, [email protected].
+ * Copyright 2003-2012, Axel Dörfler, [email protected].
  * Distributed under the terms of the MIT License.
  *
  * Copyright 2002, Manuel J. Petit. All rights reserved.
@@ -80,7 +80,7 @@ count_regions(const char* imagePath, char const* buff, int phnum, int phentsize)
 			default:
 				FATAL("%s: Unhandled pheader type in count 0x%lx\n",
 					imagePath, pheaders->p_type);
-				return B_BAD_DATA;
+				break;
 		}
 	}