llvm/test/tools/llvm-cxxfilt/alloc-token.test

## Show that llvm-cxxfilt can handle __alloc_token_ prefixed demangling.

RUN: llvm-cxxfilt __alloc_token__Znwm \
RUN:              __alloc_token__Znam \
RUN:              __alloc_token_0__Znwm \
RUN:              __alloc_token_1__Znam \
RUN:              __alloc_token_123__Z3foov \
RUN:              __alloc_token_malloc \
RUN:   | FileCheck %s

CHECK: operator new(unsigned long) (.alloc_token)
CHECK-NEXT: operator new[](unsigned long) (.alloc_token)
CHECK-NEXT: operator new(unsigned long) (.alloc_token)
CHECK-NEXT: operator new[](unsigned long) (.alloc_token)
CHECK-NEXT: foo() (.alloc_token)
CHECK-NEXT: __alloc_token_malloc