Add standard throw() spec to delete operators.

Without these specs, clang will reports mismatch between standard definitions and these declarations/definitions. These specs are ignored when compiled with -fno-exceptions.

BUG: 17136236
Change-Id: I386c712a61dc4fc74dfde45f9ec2d3d037f2e9f1
diff --git a/libc/bionic/new.cpp b/libc/bionic/new.cpp
index fcfd1bd..cd84c2e 100644
--- a/libc/bionic/new.cpp
+++ b/libc/bionic/new.cpp
@@ -38,11 +38,11 @@
     return p;
 }
 
-void  operator delete(void* ptr) {
+void  operator delete(void* ptr) throw() {
     free(ptr);
 }
 
-void  operator delete[](void* ptr) {
+void  operator delete[](void* ptr) throw() {
     free(ptr);
 }
 
@@ -54,10 +54,10 @@
     return malloc(size);
 }
 
-void  operator delete(void* ptr, const std::nothrow_t&) {
+void  operator delete(void* ptr, const std::nothrow_t&) throw() {
     free(ptr);
 }
 
-void  operator delete[](void* ptr, const std::nothrow_t&) {
+void  operator delete[](void* ptr, const std::nothrow_t&) throw() {
     free(ptr);
 }